Noticed mine have perished/broken up, but still in place. Thinking of replacing them , but glueing nylon washers on both bonnet and body and maybe something in between. Anyone come up with anything better.
Now I know - tap washers! When I replaced mine + stainless steel bolts etc, I couldn't find a matching rubber washers anywhere - in the end I wandered into a garage and they gave me a couple from the mechanics kit box.