Sorry, only check here every week or so now a days. The closet one I know of is Berks County. Used to get mine in Lancaster while visiting a friend but they stopped issuing non-resident.
"The purpose of the pistol is to stop a fight that somebody else has started, almost always at very short range." -- Jeff Cooper
FYI- just made several calls. Closest PA county issuing out-of-state 'License to Carry Firearms' is York. Can apply online. Need to pick up in person.
NOT - Delaware, Chester, Berks, or Lancaster.