http://www.saems.com/
I don't know how to do the link thing, but there is the web address. Reciprocity in PA is easy if you have national registry. Although it's technically not a registry state, they'll take your registry, license from your home state, have you fill out an application, they'll make a call to your home state to make sure you're eligible to practice, and you'll have your PA card. When I moved from Arkansas to Pennsylvania, I went to the regional EMS council for my home region and had a card within 20 minutes.
Good Luck.