Bill - check out Race and Street. Their website is at
http://www.raceandstreet.com/ptindex/
They are generally thought to be one of the best vendors out there and their prices are always very good. Expect to pay 3 -400 bucks depending on what you are looking for.
The other place to look is Wyckoff Chrysler as they also have good discounted prices on the Internet orders
http://www.wyckoff-mopar-parts.com/ptcruiserstore.html
Hey, I could also tell you where not to order from...!!
[:I]