Good luck in your search. It took me awhile to find mine, but it happened rather unexpectedly.

 

Be patient in your search but be ready with the funding and process for PPI in the location the car is at. I have a CPO C4S (my first one) shipped from SFO. The GT3 was from a non Porsche dealer but an in- state dealer who hosts Porsche club/car gatherings at his place in Eastern WA. I placed a refundable deposit same day I read about the car (last August) and arranged to have a PPI at my shop in Seattle within 3 days of the deposit. (He towed it on a flatbed from Portland where he had routine service at Sunset)
Bought it that night after everything checked out. Wasn't too worried about the CPO because I was going to track and mod it (had coolant welds done this winter off season). Bought it with 10.7K miles. Have put on 3K since with 7 track days. Will replace PCCB with steel when rotors wear out; and change PCCB pads when at 50%.
GLWS