<< Yeah, tried all of that... it's definitely the display gun. >>
Okay, based on your diagnosis, even though you'd pay probably $500 or so, its very easy to repair. CRT, short for cathode ray tube, is the big heavy glass tube in your monitor. All the guns, shadow mask, screen surface and any other damage within the glass envelope can not be repaired and must be replaced. Just remove the cathode ray tube and install a new one. Don't come whining to me if it doesn't work though, because the only reason it wouldn't work is if your diagnosis was faulty to begin with.