There are no suppliers in Norway. Some have a fragrance oil or two for astronomical prices. So you have to buy from abroad.
Many suppliers ship to Norway, but many don't. I bought from Eroma in Australia (very high shipping cost), and had to arrange shipping myself (which was a plus since I then could write my own freight paper and sneak it thru our strict customs. What I saved there helped to justify the high shipping cost).
Buying fragrances (or anything else) when situated in Norway can be very frustrating. Outside the EU often means outside the known world. You will often find that EU suppliers ship to EU countries only. You will also find that some charge ridicilous high shipping costs to send outside EU. Others have very low shipping costs. I can't remember which suppliers who do what, since it's been a while ago and I did not keep any records of my research.
So, what I will recommend you to do is to always to put one item in your cart and go directly to checkout. You can always interrupt the checkout. That will save you a ton of problems. I can't count all the times I forgot and just kept on shopping for hours, just to realize in the end that they did not ship to Norway or the shipping was sky rocket high. So, a test-checkout first, then shop afterwards.
Before you do your final checkout, you should visit the Norwegian customs and calculate what you will have to pay all-together (otherwise you can get a real shock!). Visit toll.no (the calculator is the first that pops up). Orders under 350 NOK included shipping are free of charges and norwegian VAT.
If you don't need specific scents from a specific supplier, then choose a supplier that does a VAT exempt. Otherwise you will end up paying double VAT, the country you buy from and norwegian VAT. That can be 50% extra (25% in each country).
You can check for VAT exempt when you do your test-checkout. If VAT is not added after you choose shipping to Norway, or if the items costs less than their given price, then they give a VAT exempt.
Also be aware of extra fees some suppliers can charge you. Some customs clearance fees, around 25 GBP. They don't have to pay anything, even if they claim so. You have to pay it. If they charge you extra, you will pay double. So avoid those suppliers. I thought the Soap Kitchen did just that, but when doing a test-checkout now, it seem like they don't. But they do have high shipping costs if you buy just a small order. For bigger orders, the shipping is fine.
In general, Western Europe have the lowest shipping costs. Eastern Europe have high shipping, but can have lower priced goods. Southern Europe have in general okey shipping costs, depending. And America have really high shipping, always. Australia the same. Even higher than America, which makes sense regarding the distance.
To find suppliers in Europe is not that easy. You have to search in different languages. Kosmetische rohstoffe (cosmetic raw materials) and duftöle (fragrance oils) are examples of terms you can use to find suppliers from Germany and Austria. You can also get some Swiss results. Switzerland have almost always higher prices than other countries.
Apart from the suppliers Dee-Anna mentioned, I will add Behawe.com (Germany), Granvelada.com (Spain). Newdirectionsuk.com (UK), Mysticmomentsuk.com (UK). And it exists many more.
Granvelada in Spain have lots of fragrances (plus colors, equipments etc). The shipping is quite high to Norway, so I would avoid Granvelada in general and rather look for another supplier with cheaper shipping. But they have a huge array of fragrances you might not find elsewhere. Lots of single notes, for example. So it can be worth the extra shipping, depending on what you are after.
The site is in spanish or portuguese only, but it's not too difficult to navigate and understand, especially with help from Google Translate. Here is a link directly to their fragrance oils (not affiliate link and I have not bought from them and can't say anything about their oil's quality and performance):
https://www.granvelada.com/es/28-donde-comprar-esencias-para-hacer-jabones-jabon-velas-perfumes
Are you moving to Norway? If not, you should :-D