I got them from Etsy. They all came with borders so I had to 3D print a jig to get the cuts right with a razor knife. They’re still a little wobbly but they’re good enough.

I did self host a steamcache years back but no, its one of the few “normie” stickers but few people I know that would even recognize that. I also don’t self host the Zigbee protocol, and I gave up OPNsense for Ubitquiti 2 years ago so no, that’s not self hosted either. I only have one laptop so my hobbies have to coexist on it.