Flavor Compounds for Macarons?

Moon Unit wants to make some exotic macarons. We have been surfing around looking for flavor compounds (or, less preferentially, extracts) to use in the recipe. And we’re finding some great ones (Guanbana anyone? Mastic? Meyer Lemon? Tamarind?) But they all seem to come in 2.2 pound buckets. For around $300.

Does anyone know of a good supplier for more reasonably sized exotic flavorings?

Thanks for any leads you can provide!

I’m giving this a bump in the hopes that folks were off busy for the holiday and might notice it now. Any ideas?