Vinyl Window Vent lock is broken

I need a couple of vent locks for a vinyl window. The slot is 1/4" W x 1" L. The photo shows the current one. The piece is broken at the bottom. I do not need an exact match. I can use a substitute as long as it works.

I can file the hole to make it a little bigger if needed.

You were recommended by Grayboyes Window & Door in East Norriton, PA

Thank you,
Rich L