Hello friend! My fiancee and I were a set of mushroom people with *giant* craft foam hats this last year at Forest (finished product pictures here, making of pictures here). 😊

The ones on Etsy are either HUGE and/or too thicc, or are crocheted.

When you buy the pattern, you get to control how large you want to make them by how large you cut the foam strips. We purposely made ours huge to have the biggest effect. But we have a bunch of leftover foam and are considering using it to make smaller versions that are less cumbersome to travel with. This is the Etsy store we bought from, and is what I'd recommend.

I’m looking for one that almost beret-sized but isn’t as flimsy as a regular beret.

You can totally make it beret-sized if you want; I did see other mushroom wearers around who did that. Otherwise we have some low-effort ones that we bought from Amazon (photo of us wearing them here) for Halloween, which are a lot less trouble to deal with.

Can someone pls help me find who makes these so i can give them my monies?

This is just my opinion as I'm not a big foam crafts-person, but I've had a lot of people ask to pay me to make them one, and it's gonna be a no from me. Unfortunately it's just too much time, effort, and testing personalized specs (for example, specific head size for the wrap to sit on). The amount I'd charge would be unreal lol, on top of shipping. If you can't find someone willing to do it, try to make them yourself and make it a labor of love!

Feel free to AMA else! Cheers!

Edit: Looks like that store I recommended is selling pre-made smaller ones for $90 + shipping, so maybe check those out! Link here.