A guy I noticed on ebay is selling a set of inserts for rear bumper guards, yes they are OEM GM stock, at least in the pictures. Are these things really going for this kind of money or if you shop it around will some more come up for cheaper. Is there a lot of GM stock available on these rubber pieces. I have seen them as reproduced items but have never seen the quality. Mine are 43 years and showing signs of age. If the quality is good on the cheaper repros, please advise. The OEM NOS ones are a lot of money for 2 1/2 cents of molded rubber.