Could be a simple fix??
 

1986 carrera coupe, after changing out the rear torsion bars and having to reinstall the rocker panels I found those white plastic spacers that are used between the lower rocker and the mounting braces were cracked and fell apart, tried to glue them but still fell apart. Someone must have experienced this and found a suitable replacement or a way to create a replacement from something simple to obtain. Mine are about 3/4" in diameter and about 1/2 thick with a 3/16" hole in the center.

Check the "odd parts" bin at Menard's or your local super hardware store. I've seen washers close to that size.

ACE hardware will have a row of goody boxes. One of them should have nylon spacers. I actually used some that came with a wall mount for an LCD TV. It came with probably 40 different washers. Been using them for all sorts of things.