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Since nobody else has an idea if you can't get them off any other way there's always drilling the head off or my preferred way would be to have somebody carefully tack weld a small bolt to the head and back it out that way.
Or maybe grove the head with a Dremel abrasive wheel and try using a screwdriver. Whatever method you use it's not going to be a picnic.
I do believe that McGard was the vendor and in the past with information a key was generally available. I've actually sent them a digital image of locks in the past and they've ID'd the key and replaced them. Of course for a fee.
Do they still or will they? A phone call will answer that. I'd avoid e-mail contact and tolerate a phone system if I actually needed something.
I had some wheels with a similar retention system/lock and once I ID'd the thread I used some Torx head pan-head screws to replace them. I wasn't concerned with security and/or appearance at the time and these weren't for a Corvette. I believe you could do the same with either chrome or stainless if you weren't concerned with the security. ID the thread and give it a go.
Do not recall the inside depth of the wheel lock key, sold the 89 15+ years ago.
What works for me on worn wrench sockets is to dress down the working end on a belt sander effectively removing the worn edge & restoring the tool definition.
I do believe that McGard was the vendor and in the past with information a key was generally available. I've actually sent them a digital image of locks in the past and they've ID'd the key and replaced them. Of course for a fee.
Do they still or will they? A phone call will answer that. I'd avoid e-mail contact and tolerate a phone system if I actually needed something.
I had some wheels with a similar retention system/lock and once I ID'd the thread I used some Torx head pan-head screws to replace them. I wasn't concerned with security and/or appearance at the time and these weren't for a Corvette. I believe you could do the same with either chrome or stainless if you weren't concerned with the security. ID the thread and give it a go.
Designer Imagines A Corvette That Looks More Like a Corvette Than the Corvette
Slideshow: A Jaguar designer's personal project imagines what a modern front-engined Corvette might look like if Chevrolet revisited the golden age of the Stingray.