This could include things like stick-on rubber feet for coasters, or even accessories for the laser machines themselves (honeycomb beds, rotary axes?)

I know there are online stores that specialize in laser blanks and supplies but it seemed they were all targeted for bulk commercial customers, not hobbyists like me. Amazon is where I get most of my stuff.

For the backlit mirrors I just use shadow box frames from Michaels or Hobby lobby, then throw my own RGB led strips behind the glass. When those big box stores have sales you can get the frames cheap. Honestly the most expensive part was the led strips, and you can find them on Alibaba pretty cheap.

The 12"x12" frames perfectly fit the 12"x12" mirrors I get on amazon