This parts wiki had details on the galvos and sources for replacements:
http://form1printer.pbworks.com/w/page/73582883/Replacement%20Components
Unfortunately some of the links there are dead and I’m not sure if the galvo components can still be found anywhere on the market. But at least it’s a starting point.
This thread might also be interesting if you decide to attempt a repair:
Is your laser in good condition? Any issues with prints before you tried cleaning? I might be interested in the “for parts” printer, or just the laser.
I empathize with your situation. The original laser in my beloved Form 1+ died ages ago. I attempted a repair but wound up cracking the lens. A kind forum user even sent me an old laser they had kicking around from their mothballed printer, but unfortunately it didn’t work. After several months I finally got a Peopoly laser and it works well, but the power doesn’t quite match that of the original Formlabs lasers and it’s best used only with OpenFL. I’d be keen to obtain a working original laser.