Used Rear Bumper

[Lindon]

I want to replace the rear bumper on my 1978 Clipper. Would like to know if there are any Clippers being salvaged which might still have a good condition rear bumper? Are the rear bumpers for the 21' Clippers the same for all floor plans for all years? Does anyone know if there are any rear bumpers used on other vehicles (e.g., cars?) which would be a suitable replacement?