Part question
 

Recently purchased an 02 Blazer "LS". Previous owner took the cheap ( and wrong) route and drilled the rear bumper and put in a 2" ball. I'm going to put in a hitch assembly and want to replace the molding in the center but have no idea where to order it from short of replacing the bumper. Anyone that could give me a kick in the right direction?

check LMC or a local bone yard.

I wouldn't say the previous owner did anything wrong providing he/she didn't exceed the tounge and tow weight limits of the bumper. The bumper is designed to tow with after all.

Check your local junk yards and you should be able to find a replacement.