PCarShops shows there are several indys in that area:
Porsche Repair Shops & Mechanics Near pittsburgh, pa | PCarShops.com
They might be a good lead on a well-cared for example. Plus you will want to find a good one anyway to help you once you have the car.
I was going to suggest Kevin at the Porsche Specialist in Broomhall, PA but when I looked on the map it was 4 hours away. However that is not too far to go get the right car. I flew in that morning, had Kevin do the PPI on mine and then drove it back to NC that night. Highly recommended. And a fun road trip too
Steve