NVR casement window operator crank

A home owner from Rising Sun MD says:
I have a NVR 4500 series casement window from 2005. I purchased a new 9.5" operator window crank assembly but my old one doesn't have the plastic bushing on the pivot, it's steel. Then I looked at just purchasing a new track for the bottom of the window and I don't see anything like the one I have. Here is a picture of the window sticker and crank assembly, could you please help? Thanks!
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Bob from SWISCO responded:

Can you show us the entire operator? That would help narrow down exactly what new tracks you might need. Many thanks. 

A home owner from Rising Sun MD says:
Additional pictures.
Thumbnail of the uploaded file named 5A68DC85-6C48-4A98-9A23-4A5E5C85F4E1.jpeg
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Bob from SWISCO responded:

This might be our 39-504. Go over the dimensions to see if it matches. Again, without seeing the casement window operator that uses this track, I can't be entirely certain, but this seems like a possible match. You can view the rest of our tracks for window operators here.

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