I have the GNX style Riken wheels on my 86 T Type. The current lugs appear to be the stock two piece type that separate over time. Is there a specific style solid lug nut I need to replace the stock ones with? I believe they are 12 x 1.5 metric but could be wrong. I would like to get a set that won't corrode or rust out over time. Any ideas or part numbers? McGuard?