Am looking to replace the barrel.
Throat has eroded to 2.033" (from 1.890" original) after 10M rds. Still shoots good and will continue to use existing barrel until it doesn't.
Where can I buy a replacement barrel when the time comes?
A competent gunsmith can get you a replacement barrel. Kreiger,Bartlein,Pac-Nor,Shilen,etc. All he will have to do is remove factory barrel and thread, chamber, and headspace your replacement barrel then get to shooting.