Unknown crank assembly needed, no markings found.

Hello. I want to repair and replace the crank assemble on my casement window. Enclosed is a picture of the crank assembly open and closed. I believe it is an Andersen window, installed as new construction in 1989. I can't find it on your website, although I found the crank arm and cover and have ordered it from you.
Can you help me with the crank assembly arms? Thank you!