aluminum screen door rollers

A from Scottsdale AZ says:
Hi. These rollers install on the outside of each corner of our sliding screen doors. The springs inside the device push the wheels up/down onto the tracks and then are adjusted by a small machine screw once the screen is positioned on the track. Any idea what part would replace this damaged one? I need 20 of these.
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Lauren from SWISCO responded:

Hello, thank you for posting! 

Please start by reviewing the style and dimensions of the 84-050N patio screen roller. Let us know what you think and if you have any additional questions. 

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