Here is a rear (red) side marker lamp from a Olds Cutlass 2-door of the '78 to '80 period (will NOT fit 4-door models).  Will fit either side of the car.  The part number is 5969596.  Is in excellent undamaged condition, with no cracks or chips or visible scratches.  Both of the small plastic pins are intact (those are usually broken on these lamps).  The metal surround is undamaged, and the bulb holder opening on the rear is undamaged.  Buyer to pay $12 shipping in the US.  International buyers, please inquire for a shipping quote.