where to find flex backing plate?

I destroyed my stock backing plate on my flex after 3 years of service. where do i get replacements?

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is 4-3/8 a stock replacement? Both my flex`s are 5.5" plates....

Flex Polishers



Something to also look into is the new Flex quick-change backing plate system - I believe it`s priced at about $50 but it has both 4" and 6" backing plates.

well, i`ve encountered a little drama while attempting to replace my backing plate. the damn nut will not come out. It just spins and spins and spins. I removed the nut from my other flex just fine. So i sent the one in question to a shop so they can tap out the nut.