Casement Window Crank

Working on a remodel for a client that has an older model Pella window crank. The crank fails to close it securely.
I took off the casement around the crank and noted that there's a notch on the moving elbow that should clip into the mounted bracket and pull the window closed.
Haven't been able to locate a model that has the same style and function. Hopeful you can help.

Thanks