@Mr_O, just got a reply from aromata.lt. They do ship worldwide. Shipping 1-2 5 ml bottles of oil to the USA costs 5 EUR, but there’s only one payment option - international bank transfer, which is a deal breaker, I guess.
Talking about calamus, @rostanf has posted an image excerpt with old rappee snuff recipes in this thread https://snuffhouse.com/discussion/12209/what-is-your-favorite-rappee-snuff . One of them calls for calamus root and bayleaves among other ingredients. Simple decoction of root should be enough for scenting the snuff. Will try out this old method, too. I believe the same could be done with hops. I know some places where the wild ones grow, my grandfather used them for his homemade beer.