Don't know about the R/T specifically, but a 2nd gen minivan condenser (narrower and a bit thicker, I think) fit nicely into my '89 Daytona Shelby (for the same purposes as you're looking for one). Had to slightly tweak the neck of one of the fittings on the condenser to meet up with my hose, but check into that option. Dirt cheap for a like-new one at the right boneyard!
EDIT: the 2nd gen part just happened to be what the van was, any minivan one would work similarly, I would think, though newer is always nice...
EDIT: the 2nd gen part just happened to be what the van was, any minivan one would work similarly, I would think, though newer is always nice...