Where to acquire Greyfields?

I need to acquire a quantity of fine wine for my ambition, but the correct type does not appear to be available at the Bazaar. Is there a way to track down Mr. Wines?[li]

First sporing? http://fallenlondon.wikia.com/wiki/Category:Greyfields_1868_First_Sporing_Sources is a list with 13 sources. http://fallenlondon.wikia.com/wiki/The_unlabelled_box is probably the one most available.

and part of the point is to convert. If you don’t know, go to the “Myself” page, find the large amount of the wines you can buy, then use actions to convert 500 of one to 105 of another, but more valuable, then convert that one to like 50 of the next one and so on.