Grant 18 bottom mount flat wheel roller

A contractor from Hawaii says:
Looking for direct replacement part. If not available, willing to substitute for different roller such as item 81-151. Most important is width of wheel is close to 3/8 inch. Wood track groove is 1/2 wide. Rollers should support approx 200 lbs per pair. Thank you. Chris
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Casey from SWISCO responded:

Hi Chris,

I wish that we could help but, unfortunately, we do not have any replacement rollers that could replace the one in your photos. Good luck with your repair. 

81-151 : Tandem Patio Door Roller, Flat Nylon
Tandem Patio Door Roller, Flat Nylon
81-151
$11.80
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