The patio door was installed in 1957. i need to replace the roller and am not sure of the part ???

A home owner from palm springs, ca says:
The patio door was installed in 1957. i need to replace the roller and am not sure of the part. I dont think it is still being manufactured, but need to know an equivalent part?? thank you
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Casey from SWISCO responded:

Hello,

I agree that this roller is going to be hard to come by. I'm going to have my expert who specializes in sliding glass doors take a look and see if we can supply and replacement options. Thank you!

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Dave Sr. from SWISCO responded:

Thanks for your patience with us. I can't be too sure if you're showing us the complete roller, or if it is missing the rest of the housing. If there is more to the roller, we ask that you upload photos of the entire part, with measurements, for us to look over. While you gather that for us, we have gone ahead and placed a list on this page of different wheels and axles for you to look over. Perhaps one of these could be used to repair your wheel. 

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