Anyone got a Rear bumper filler for sale or know where I can get one. Have had the car for 20 plus years and the Plastic/rubber has just disinegrated. Also need the electrical dash control for the heater/air conditioner. Thanks!

 

You might try this Steele Rubber Products Online Catalog I cannot recommend them as I have not used them, this was sent to me as a recommendation.

 

If you want to try a cheap-o route, there's someone parting a 75 cutlass on here right now. Snag them off of that.
They will probably be just a little too small, but they are better than nothing.