There are ~10 holes (~7/8") on the underside of the trunk lid on my 69 roundtail for placement of the speed nuts to anchor the trunk lid badges. The holes are covered with rubber plugs. I'd like to replace the plugs, but am having a hard time finding a source for replacements. I've checked a couple of auto part stores, Home Depot and McMaster-Carr with no success. Does anyone know where to find these? Thanks.