broken plastic rollers

A quick learner from California says:
I have a mirrored closet door that needs the new bottom rollers replaced.

The current rollers have Cox 21-717 21-767 imprinted on them. They are concave rollers.

The plastic rollers are made of fairly inferior plastic and did not last very long until they either broke or about to break.

Do you have replacement parts that are compatible ?

Photos attached of the hardware, track and closet.

Thank you
User submitted photos of mirror closet door hardware.
Profile picture of Paul
Paul from SWISCO responded:
Take a look at our 23-086 closet door roller with a ball bearing wheel. I think this could be a match, and with a ball bearing wheel it should hold up better.
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