Where to find Window Stop?

I'm reassembling the passenger door on my '72 Swinger, and I can't find the window stop that prevents the window from rolling up too far. I haven't found any with an online search. Any idea who might sell these, or would it just be easier to fabricate something?

vm

Honestly, you will probably spend a lot to find this, unless someone you run across has one to donate.

I would bend a piece of sheet metal and be done with it.