Replacement Casters for a Car Jack?

[73Dustr]

Does anyone know of a place that carries replacement casters for a car jack? They seem impossible to find. I called Advanced, Checker, Sears, Northern Tool, Napa, Farm and Fleet, etc. and nobody seems to carry them. Any ideas?

[indyzmike]

This place is even in Wisconsin: http://www.phjjacks.com

[73Dustr]

Thanks a lot for the reference.