There are lots of PT-19s around...so the internet will have lots of stuff. FYI: the CAF Dixie Wing has a PT-26 (I'm ninety percent sure) and it should be based at their facility south of Atlanta...Also, Mark Genest who contributes stuff in RCU is the guru of PT-19s: you could contact him with specifics. Also, there are no really scale PT-19 kits out there unless you find an old Sig kit.
Old Shep