For those of you that want something new on your valve stems, here's an idea:

http://www.customaccentsonline.com/daimlerchrysler.htm
(Note the HEMI logo in the bottom left)

The locking ones are great as they won't go missing. I had a set of these (Nismo logo) on my Murano after 2 of my stock aluminum caps went missing. Note: I said HAD, because I didn't warn the tire shop when having my winter tires swapped for summers, and they broke them off after they couldn't figure them out.

Also note that you can find them for cheaper on eBay if you look hard enough.