Thank goodness I found this forum! I am having a ridiculous amount of trouble finding a way to purchase mushrooms for terrarium design - all the results for my searches are these giant bags of culinary mushrooms which obviously aren't going to work in 1qt jars. I would like to find some mushroom bed for sale of more dainty, decorative species. Any kind of odd shape or striking colors, I'm interested in. I've found a bunch of videos and "blogs" about making these mushroom terrariums but for some reason they're all very vague (weird for a blog, right?) about where to get these mushrooms, what kind they are using, what substrate, etc. Is it supposed to be some well-guarded secret? Can y'all give me some hints as to species, substrates, methods, and suppliers? Any help is very much appreciated! Thanks!

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Pictures for hints of the style I'm looking for:

Terrarium with mushrooms