I know of business in the States which wants extract of a certain herb. Sorry, can't say right now what exactly it is.

I'd like to hear from someone who has experience making extracts, can contact me at my 'mailbox' possible collaberation, or perhaps you can just show me how it's done.

My experience with alchemy only goes as far as turning metal into gold... can't help you with the spagyric bit.

It's not technically hard to do but a lot depends on if the plant is fresh or dried and what specific sort of concentration the person wants.. Do a quick search on google for making herbal extracts and it will yield you lots of information.