i am looking to swap the grill and front bumper cover on my 91 caprice to that of a 95 96 impala ss does anyone know of a good place to find these parts?

AFAIK, the bumper covers are the same. The grille is the only difference. You can get a new grille from the dealer parts department for about $110 (P/N 10269614) or an aftermarket piece for about $55: http://www.1aauto.com/1A/Grilles/Chevrolet/Impala/EV1019993/66650

You can find an Impala SS grille on ebay for about 60,shipped.

thats about what i payed for my grill

i bught my grill from ebay for $90 shipped original replacemrnt
its better then that fake one but it's not a bolt on you will heve to make some modifications to it since the caprice have the screw thru the out side of the grill and the impala has them on the in side. i did some crumy work on mine but you caint tell from the out side. I put enugh washer to hold it in place