our sliding glass door won't roll!

A quick learner from Sonora CA says:
Hi I have just discovered this company, I am hoping you can help us replace this old roller? There is no brand on it and we have no idea if you can find these but they are shot so please let me know! Thanks!!
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Tom from SWISCO responded:

Thanks for contacting us. It's tough to make out what your roller is while it's still installed, but I think it may be a match for our 81-092. Your next step should be to remove the original and ensure that the design and size matches up to our product. If it differs in any way, let me know and we can pursue other options.

Alternate image for 81-092
Alternate image for 81-092

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