Blur,
OEM bags are available out there in the wild but your going to pay about 350 to 400US a piece for them new when you find some. Used are cheaper but they are still old.

I was in the same position as you and managed to find a good spare and some basically new take off OEM bags as i just couldnt afford a quad bag setup (the US to CDN exchanges just kills it).....if i didnt luck out my plan was to go Sully or similar as it was the best compromise between parts/cost.

The broken wheel stud is going to be a pain to replace unless its in the rear....i havent looked closely enough to see if one can sneak it in/out without disturbing the front hub/bearing.

Stupid question perhaps but has that coach been safetied yet?