sliding window roller

A quick learner from 94114 says:
On the left is Swisco part # 87-213 . Now I'm trying to find the 2nd roller on the right(brown plastic) that doesn't have the large end piece for holding the whole carriage in place. any ideas? I don't need it to be brown, any color will do.

User submitted photo of their window hardware.
Profile picture of Paul
Paul from SWISCO responded:
I agree, the 87-213 looks like your best match. To me, it looks like they cut off the flange to add an additional wheel to the window.
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