If you're not a stickler for getting a OEM GE glass for your M-250R2, there's a few
Holophane 4215 refractors on eBay. They're pretty good looking and should fit. There's also a
plastic OEM GE refractor.As for arms,
these seem to be of pretty decent quality yet still affordable.
I don't think there are any Crime Fighters currently on eBay. There were a few of the M-400 310w version on eBay last fall and I saw a 175w MV M-250R one from a Ontario seller locally.