insulating washers for kline heavyweight passenger cars sold 1991-1995

If you have determined the washers from Lowes are twice the thickness, could you buy sheet cork of the correct thickness, drill holes for the inside diameter and with scissors trim to the approximate outside diameter?  No one is going to see these - you are looking for a safe operation, not trying to win a beauty contest.    John in Lansing, ILL

Thanks John, hadn’t thought of that, but will try it . 

Please let us know the results.  You would be doing those in our hobby a service and possibly save some cars from damage.  John in Lansing, ILL

Where does the washer go? Would cork survive between the body and the truck?

Might try an old mom & pop or ACE hardware store...luckily l have two not too far, one with tiny model size screws, and sold individually. There is also that chain of fastener stores...ah!  Fastenal.