Peru Balsam is said to have a nice vanilla scent. You can try that instead of using a vanilla absolute which is a bit pricey. Here is the information on Peru Balsam:
This is a liquid essential oil, not a resin. This is not a thick brown resin, it is a pale yellow essential oil which has had the thick brown crude essential oil removed and which has a vanilla-type scent. Balsam Per� is a different physiological form of Balsam Tol�. The balsam is a pathological product from older trees. Balsam Per� is used as a natural fixative to make a little scent go a long way. Among its uses: anti-infective, on chafed skin to soothe, massage of muscles for circulation, inhalant for respiratory and immune systems, effective at relieving itch of scabies, ringworm and eczema, as well as for relieving chapped hands and feet. Exotic aroma, anchoring, strengthening and imparts a rich, earthy scent to perfumes. Some believe it is a skin sensitizer. Use with caution. Flash point: 200F.
Hope this helps you out. I haven't tried it yet but I will be ordering it soon.
Rose