Bypass sliding closet door rollers

A quick learner from Jacksonville, IL says:
Hi,
We have bypass sliding doors from the 1950s/1960s. The rollers have become worn and the doors are difficult to move. The pictures are from the back door since it has been sticking the most. The doors are 1-3/8" thick and are hollow. The front door has different hardware but still seems to be working for now. Do you know what I could use to fix this door?
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Paul from SWISCO responded:

Take a close look at our 23-010 rear closet door roller ,with measurements, and see if it lines up with yours.  

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