53 BUICK SPECIAL CONV.

DOES ANYBODY KNOW WHAT YEAR MAKE AND MODEL BUMPER WILL FIT ON THE BACK OF MY 53 BUICK SPECIAL .I HAVE ORIG.BUT I WOULD LIKE TO PUT A SMOOTH REAR BUMPER ON THE BACK WITHOUT THE DISH IN THE CENTER SO I CAN RUN A SOLID BLADE WITHOUT CARRIAGE BOLTS.....RUMMOR HAS IT THAT A 49 MERC FRONT OR A 49 OR 50 OLDS FRONT WILL WORK?