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I have to replace a few of the old keel rollers on my trailer. They are 12" long, but have a shaft diameter of 1 3/8". Or I've been told they are old Pipe shafts? I can't seem to find any replacements. 5/8" shafts are all I can find on the new rollers. Any suggestions on where to find replacement rollers with the large diameter or how to retro fit my brackets to accpet the 5/8" shafts?

Thanks!