Some of the Xenon parts, like the side skirts work well on 06 - got them myself. Otherwise, check out the The PTCruiserworld.com site "Aftermarket" and "Body" forums; Pteazer.com; and APC.
Oh! Don't let the fact that the PTeazer bumperettes are only fiberglass bother you. They won't likely make enough of them to warrant the $100K for a urethane mold. But, the fiberglass is easier to repair; and I've had it done twice now with great results.