I have an original rear bumper complete unit for the 1974. The stainless portion has been recently professionally polished, no dings, no scratches. As pictured complete including the unbroken rub strip with it's securing tabs, nuts, washers and the bumperettes. $400 shipped well packed and insured.
I've got a brand new, never been mounted, NOS OEM right front bumper assembly (without overrider).. has been on the shelf for years wrapped in Alfa bubble wrap and Alfa orange tape.. $500 if interested..