I'm still in the early planning stages of a fabrication for a hand crank drive for the stabilizing jacks for my vendor trailer.I'll get some pictures up the next time I am at the shop as to what I want to do.I know this is off the topics on this site,but I thought someone might give me a lead for a source of the pictured bearing holder with either a I.D. bearing of 1/2" or 5/8".