Request for sliding door hardware

A quick learner from Milwaukee, WI says:
I am looking for sliding door replacement hardware. I have attached pictures of the one that was removed from the existing door. The wheel appears to be 7/8" diameter and the offset is 1/2". if you look closely at the second picture there are front and back, dimensions of 3/4" (front) and 1 3/8" (back). The manufacturer is "Medalist".

Do you have anything like this?

Thank you.
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Bob from SWISCO responded:

I am afraid this exact roller is no longer available. But see our 23-089. This has a 1/2" offset and a 7/8" diameter roller. Look it over and let me know if you think this could work as a replacement. 

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