Go to some jam markets and walk past the fruit stalls to the guy who makes the mushroom pâté. Ask him where his son or daughter is. Follow them into a van or a shack.
Alright I need to visit more Sunday markets I see. I've never seen anyone selling mushroom pate ever but this sounds promising - I'll be getting something in that van, not sure what, but something
I dont know anything about it, but apparently there is not a completely legal way to get a sample of spores that totally aren't useable to grow your own and there are not plenty of instructions on how to do it online. Certainly do not look it up.
Unfortunately I wouldn't have the physical space and/or stable conditions to do something like that since I am somewhat of a nomad. That is of course, hypothetically speaking because I don't know anything and I didn't look anything up.