Keith: If I am correct, these have a brass ferrule at the bottom, with the caster integral with it. I also needed to replace a set some time ago. It's been a while, but I remember being able to remove the caster from the brass ferrule, and drill the ferrule large enough for a caster from a supply house. I believe there were four screws on the bottom of the brass piece holding it in place. I drilled out the bottom of the leg for the plastic insert which was supplied with the caster. I can't remember whether the insert was installed before or after the ferrule, but it worked well and looked great. Good luck! Paul McCloud, RPT
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