You can get the side lettering from Dodge - the chrome side lettering were put on the silver cars, and I got mine for something like $100 2 years ago.
HOWEVER, Dodge never made/stocked/sold any chrome rear lettering, and if you put the chrome side lettering on the rear, they look bad (too big). So, for rear sets, you have to go to RandJ, and since they sell sets, you might as well get the sides from them at the same time. I've never bought from RandJ, but their stuff looks very nice, and comes highly recommended by others.