Searching for im6657mi Window Roller

A quick learner says:
I'm looking for a roller for a Milgard Styleline window. Its called a Universal roller assembly. Part #IM6657MI
What you can't see is there's 2 holes in the bottom of the frame holding the sliding glass window the roller attaches to. the bottom of the roller has 2 small tips that fit in the holes. the holes are only about an inch apart from each other. See attached pix
Thumbnail of the uploaded file named window roller.jpg
Thumbnail of the uploaded file named window roller 2.jpg
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Bob from SWISCO responded:

This looks a little like our 87-201. Look it over and see if this matches what you need. 

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