Sliding window rollers

A quick learner from Arizona says:
1 inch long by about 5/16 " in plastic case roller appears to be steel rolling on a pin.
No numbers or name on roller or windows.
Windows are original to house built in 1996.
Maybe a substitute would work.
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Bob from SWISCO responded:

The closest match seems to be something like our 87-147, but you'll need to compare all the dimensions to see if this could work for you. Let me know what you find. 

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