Sliding exterior door roller

A quick learner from Paso Robles ca says:
The roller assembly from my exterior sliding door is broken. I was replacing the wheel when one arm of the assembly itself broke. The door is also designed to have the screen on the interior and the lift out door on the outside if that makes a difference. Can you please tell me if this part is available as a replacment?
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Paul from SWISCO responded:

We appreciate your patience with us. Please take a look and compare your roller to our 81-129. See if this roller would make a good alternative for  you.

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