I understand that Galbanum grows in regions of Russia and the Mid East, where it is sometimes sold as a condiment.
Someone told me that, in his country, 100 seeds could cost 1USD. Then, he just went away, without completing the trade.
I am growing Myrrh and have Frankincense, on the way, to barter. I can cover expenses plus shipping, and a little something, for your trouble, if you're able to locate this evasive seed. Thanks very much.