Plastic slide for Simonton casement window

A home owner from Hampshire, IL says:
Hi. I'm trying to find a replacement for a broken clip in a casement window. It is the piece that connects the arm to the window and slides along a the track at the bottom of the window. I have a Simonton casement window, and the part is a small black plastic square with a circular hole where the arm fits. I need a name or part number for this. The window was built in 2013 but I don't find a model number. Thanks!
A home owner from Hampshire, IL says:
Hey, I found the part on your site and placed my order. Nice to be able to fix the window for less than $5.
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Tom from SWISCO responded:
We're glad you found it! It looks like the 39-529 was the part you needed.
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