CasterHQ Jack Caster 3-1/2 Steel Wheel Caster (Set of 4) 350 Lbs Capacity P
CasterHQ's Jack Casters are made to replace Jack Casters that use a Top Plate instead of a stem. These are very high quality, low profile, strong casters.
These are industry standard and should be universal to most Jack Stands with Plate Casters.