Repair part for casement window

A quick learner from Onalaska, Wisconsin says:
One of the side windows on our front bow does not close properly. The problem, I believe, is the broken plastic piece that fastens the hinge to the bottom of the window. I am looking for a replacement. The hardware is labeled "Roto" and the number in the last photo reads OPO52020. Thanks for your help.
User submitted photos of a window operator.
Profile picture of Dave Sr.
Dave Sr. from SWISCO responded:
Take a look at our 36-013-10 hinge. Could you use this to repair your window?
A home owner from Connecticut says:
These hinges are exact dimensional matches for those in my vintage 1986 Hurd casement windows. I have been replacing sashes, and in almost all cases, the hinges' plastic "slider foot" is cracked or broken, after 30 years of use. By simply unscrewing my old hinges, and the guide track, these windows open and close like new. Happy to have found these!
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