Window slider wheel

A quick learner from USA says:
Hi, need help locating this part for 1983 "acorn" slider windows. The outer dimensions of the plastic part are 1.5" long x 1/2" wide x 5/16" tall. The wheel diameter is 6/16". Can you help?

Thanks!
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Emily from SWISCO responded:

Hello there!

We don't carry this exact roller, but take a look at our 87-053 and carefully compare our dimensions to yours to see if this matches what you need. 

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