1" Shower sliding door roller

A quick learner from California says:
Broken roller (as pictured, the bracket is OK).

I've found 3/4" but these are 1". Also as pictured, the area where the screw goes in is raised out 1/8" where the replacements I'm finding are flat.
Thumbnail of the uploaded file named jUFp_FyH6RAPzSNtwf2rIcKkiTCBefTQZP6FrfqrMx0x4eAG3R
Thumbnail of the uploaded file named Vad3bjiMi4mCyNA-vbysIml9pO8oQOC6G9XgLKz4WoWQRr9YTV
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Bob from SWISCO responded:

Thanks for posting. The closest wheel we have that comes to mind is our 10-101, but this has a diameter of 7/8". Double-check your diameter; if it's indeed 1", let me know and I'll see if we have any other alternatives. Many thanks.

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Tom from SWISCO responded:

In addition to Bob's recommendation, another part you can consider is our 32-096. This is a drawer wheel, funnily enough, but we use drawer wheels for showers all the time (and vice versa). This product in particular has a rounded edge like yours but is 1-1/8" in diameter, not 1". Would it be possible to use this wheel despite that 1/8" difference in size?

A quick learner from California says:
Thanks for both of you responses.
By my measurement, it does seem to be exactly one inch but it may not matter if we go slightly bigger or smaller.
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Tom from SWISCO responded:

It very well may not! This is one of those things where you'll probably have to mess around with it a bit before you can get something to work, but I think both options are worth considering. 

Good luck with this project, and please let us know if you run into any trouble or have an update.

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