top or bottom of sliding screen door

A quick learner from illinois says:
Cant find these anywhere or is there a replacement ?
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Tom from SWISCO responded:

I  have seen this roller a few times in the past. According to our records, this is off of a Bradford and has been discontinued for a long time. We have no confirmed substitutes. The only thing we carry that's close is the 84-100, but it is reportedly too thick to fit.

I'm sorry that we can't offer you anything for this roller.

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