Denny,
I know you are a person of detail and can or would make an original. Would a tub and faucet stem socket be a reasonable facsmile of the spark plug socket? You can buy them at a hardware/plumbing supply store. Leave it outside in the weather a couple days, get a little rust.....Wow a original tool to the untrained eye! What size is it? I may have one(already rusty).
Dan
