The only way to replace the steering wheel emblem is to replace the air bag. If you don't mind a custom emblem check out this thread:
http://forums.bradbarnett.net/showth...light=steering
As for the rear emblem, its not to hard to replace, you can even remove it in total and add the rear deck plate by CDC if you wanted. Check some of the sponsor's pages, most of them have the emblem or the deck plates.