3mm ACW Miniatures UK?

Hi, I’m looking to experiment with very small scale gaming and I was wondering if anyone has some good advice for American Civil War miniatures in 3mm or 2mm obtainable in the UK?

I’ve tried to do some research but it’s a bit confusing and patchy. I don’t have a 3D printer but can probably get stuff printed if pointed to STLs, but ideally I don’t want to bother my friends with scaling stuff down.