Search "col de dame", select the a topic, next see who posted a photo of their tree, then politely introduce yourself, the reason of the PM and hope they may consider an air layer. This is one of the hardest Fig trees to acquire, everyone wants this tree, even the for long time members.
Personally, the idea of me having one is a fantasy but truthfully, its too much to care for nor do I have the time, I did in the beginning... Because I thought I could grow anything. Nope. Not in Idaho! So I lost huge investments and damn near killed my cuttings (this is while I was taking care of it). Can you imagine if I owned a col de dame? I would be pissed.
The point is get a tree that's suits your climate. Because when you ask a member for a cutting or an air layer, chances are they would like reassurance that their "baby" is going to safe place. Anyway that's my input. This is a really really awesome fig tree.
Good luck