Crank Replacement with two holes on the top and bottom tab

I'm looking to replace a window crank. Our home was built in the early 60s and I believe the windows are original. The crank has two screws on the top and the bottom, although this piece has the two at the bottom broken off (it's the same arrangement of screws as the top two. I've included one in the window too. It appears similar to the Look-Rusco on your website. Thanks!