The only rims I've found through a couple of sites (tirerack.com, discounttire.com, wheelmax.com, etc.) that even come close to these are this set of Bremmer Kraft BR02 Chrome Plated Wheels:
But, I don't think those are the ones pictured. The ones on the PT appear to bend outwards very close to the centercap and continue towards the inside of the car as it goes to the lip.. Hopefully someone will recognize the rims, or maybe even the PT itself..