Your best bet is very local. Go to craft fairs and farmers markets/Christmas markets, flea markets, and such. Around my area in Belgium, I went to our flea market and Christmas market in my village and found there are 2 people with small laser engraving/cutting side businesses for wood (perfect for coasters) and 2-3 people selling 3d-print stuff.

It is almost impossible to find these people online because google won’t allow it and pushes the companies with SEO or paying them.