I live just south of da 'burgh. My local gun shops usually always have one or two on stock. I'll try to take a look for you one day this week if I get off work in time.
In the meantime give Ace in Washington, PA a call. They usually have lots of everything in stock, new and used, pretty reasonable.
Other than that, Anthony Arms in West Mifflin isn't as big but they usually have a decent selection, maybe try there next.
Hellfire, Doom, Watch the hatred spin
Beyond the speed of sound---
Fire it up, Let the engines roll
It's time to burn it down