Geesh, at one time I could rattle off the locations of at least a dozen in central PA. Ft Chambers is a good place. Jimmy Cullers is a first rate guy and a trained gunsmith if anyone ever needs work done.
NORTHEST TRADERS JUST OUTSIDE OF MUNCY ON JOHN BRADY DRIVE. ITS REAL CLOSE TO THE KELLOGES PLANT
I bought my 1st muzzeloader from him & he sold me a Traditions Deer hunter for $300 that was a POS. Everytime you tilted the gun you lost all the powder because there was at least 1/4" gap from the pan to the touch hole.
I brought that brand new gun back to him 3 times for repairs. He ended up welding a washer next to the pan to decrease the gap.
If that guy was an expert why did he sell me the Traditions? IMO, go to Dixons.