Casement window clip

Hello! Thanks for reaching out to us. That clip you show here isn't sold separately, unfortunately. Furthermore I don't believe the hinge assembly as a whole is made anymore.

My suggestion is a new replacement hinge set like our 36-048. The design is different from your original, but as long as the sill track is the same size at 10" long then it should still work. Just make sure that you replace the top and bottom at the same time to ensure a symmetrical operation. Some adaptation may also be required, such as drilling new holes.