I have the full Kinsten PCB system I’m getting rid of (double side UV exposure box, special transparent paper, PCB material, developer, etchant, bubble etch tank.)
Photo chemicals are out of date, but still might be worth a try using them. You can still buy all the boards and developer for a couple of dollars, e.g. https://core-electronics.com.au/brands/kinsten-australia
I don’t want to dump it on the space, but if anyone is interested in having a play I’m more than happy to donate it rather than the alternatives.
Might be useful for some art use cases as well (I’ve heard of people exposing and etching various materials.)