Ebay has a tonne of them. https://www.ebay.com/sch/i.html?_from=R40&_trksid=p2334524.m...

My dad used a 3D printer with a Dremel attached to carve PCBs. The PCBs were those that you normally etch, i.e. they had a full copper coating.

We used to use the top end of the HP plotter range (approx. £12k) when I worked at one of the Big consulting engineers.

I recall we used to move them into the aircon computer room so we could run them over night for increased accuracy.

You could possibly get a very cheap 3D printer and rig it for 2D plotting fairly easily (using the printer itself to manufacture the missing parts even!)