Hi, I have a 1983 Oldsmobile Cutlass Supreme 4 door and need another rear bumper. My bumper is rotted bad, I'm having a hard time finding a bumper at a reasonable price. Everything I find is in the $300++++ range and is to much $$ for this car. So, my question is; what rear bumpers are interchangeable for the 4 door Cutlass? I looked at a 79 malibu bumper and no good, are there any regal, grand prix or a 1978 2 door rear bumper close enough to fit? I'm usong duct tape for now....lol Any advice is appreciated. Thanks, gene