Is there a "measurement" system for center caps?? In other words, is there a way to cross reference what size or type of center caps fit our wheels. On the one hand, i want another set of Lotus center caps , but on the other hand, I'm not too happy how the clear pastic centers are ??popping ?cracking out over time. That sponsor that sold center caps basically had no clue about fitments for our stock base and LSS wheels which was disappointingI'd be happy with any snap in aluminum center cap for track use(would withstand heat better which I suspect is the downfall of the stock center caps. My search yielded no input on the topic. These should be a REAL cheap part!