[PeteA216]

I've never seen the '80s body style trunks use shocks to hold themselves up. I've always seen the adjustable torsion springs up across the panel below the rear window. If there are aftermarket shock type trunk props already installed, then I'm sure you can find some with matching lengths at a junkyard or auto parts store. Check to see though if you have those springs. The look like long thin rods across the back upper area where the speakers are.