7/8" shower door wheel, concave

A quick learner says:
Hi!

I need to find 12 of these wheels asap!!
A customer submitted photo of a roller.
Profile picture of Dave Sr.
Dave Sr. from SWISCO responded:
Thanks for posting! Could you give me a bit more information, if possible? Are these for a drawer, or perhaps a door? Did they come off of a larger roller unit?
A quick learner says:
the wheels are at the borrom of a tub/shower enclosure. the wheeles are fixed to a frame, with the screws shown, which holds the glass and runs along a track fixed to the tub. thanks if more photos required let me know
Profile picture of Dave Sr.
Dave Sr. from SWISCO responded:
Thank you. To be honest, I'm a little stumped. I know we've had trouble before looking for concave wheels at 7/8" diameter. The only shower door wheels we have at that size are our 10-101 and 10-109, but they're convex or flat.

Do you know the manufacturer of the door? That may help us find something.
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