Where can I get a rear step bumper for a 1989 Dodger Ramcharger? Will a bumper for a 1989 D150 truck fit the ramcharger?

 

yup 72-93 Dodge pickup van (not "minivan") and ramcharger; actually one from an 87-down Shivvy or 96-down Ford will have exactly teh same frame spacing
Alot of guys used to go with aftermarket step bumpers hitches etc back then and there was ALOT more "one size fitz all" going on.