Pivot Pin for Double Hung, Tilt-In windowns

A home owner from Ann Arbor, Michigan says:
I don't know the manufacturer, but very likely Canadian, as my home is a modular home, built by Royal Homes in Wingham, Ontario. No markings or numbers of any kind on the part. The home is only 17-years old, but several of these have either broken or have been pried out from the windows -- mostly the uppers, but some lowers as well.
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Bob from SWISCO responded:

Start by considering our 26-454. While it only has one horn instead of two, I think it might fit your pivot shoe just fine, so long as all the other dimensions match up. Let me know what you think. 

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