@Fishingerk1 , I found two things when I googled for a Saipua recipe.
First, is what
@DeeAnna and
@Carly B also found.
It looks like Saipua is a company out of New York that sells handcrafted soap and also makes flower arrangements (from flowers that they grow on their own farm.) I thought maybe the paper you referenced them using was to create an imprint on the soap or as an exfoliant inside the soap- my mind really got ahead of itself.... But, looks like Saipua wraps their soaps in really beautiful paper.
If this is the soap you were hoping to reproduce, the good news is that these are very common oils, easy to find and use. The bad news is Saipua make their own paper. So, they probably won't sell it to you- since that's their niche. But, there are many handmade paper vendors where you can get some beautiful paper.
I see that one of the owners, Sarah Ryhanen, is of Finnish descent and Saipua means "soap" in Finnish. Her company seems well respected. Her prices are a little steep, but to be honest, that's about in line with soap sold by LUSH in the Seattle area. I confess to having bought some in the past when going to a birthday party on short notice, and gifts weren't really expected. My older son was given some LUSH soap by a friend with lemon fragrance and brazilian sand that he loves and which i intend to copy one of these days ( I brought home some superfine sand from Celestun, Mexico for that purpose.) So, there is a market for this very high end priced soap.
The second thing I found is that there is a traditional Finnish sauna soap. It's made from vegetable oils and citric acid to harden it.
So, I don't know about the milled part- I think that's just re-batching. But, if its soap like Saipua, it should be easy enough for you to make some soap and wrap it in beautiful paper. I guess you can do the same with sauna soap.
I hope our input has been helpful to you! Good luck!