Do a run of Mopar specific rims and see if they sell. Nobody has ever made good performance wheels for Mopar muscle cars. It should be easy but nobody has ever done it. It is a fairly simple combination of center hole size, offset, caliper clearance and width. Use a nice lightweight design and offer them in performance sizes.

If there was a good bolt on performance rim for Mopar vehicles then perhaps there would be more people looking for suspension parts. I'd suggest hooking up with the guys at Baer to make sure the wheels clear their top of the line brake kits.