It looks exactly like the tank fitted to my Revell "Master Class" compressor;
The compressor complete in comes @ about £175.00, it is a rebranded Sparmax compressor. I could be wrong here, but I would think trying to get a new tank for the compressor may not be cost effective. I think your best bet would be to have it repaired on the side by a fabricator / fitter, as the tank appears to have a flange around the damaged thread - this could be cleaned out & an insert fitted to make it "good as new".
Done: B-1B, XB-70, IV-A, Vulcan, Hawk
In the pot: 1/72 B-58, 1/72 Victor
Wants: 1/72 TU-160, TU22-M3 & another Vulcan