3 rd seat lock?

I need to lock the 3rd seat/stowage space in my '89 Buick boxie. The factory lock cylinder and lock bar are fine, the catch part that screws to the body is just 2 broken nubs, screwed to the body.

Any idea where I can get a replacement catch or even a picture that I could fabricate one from?

Thanks for the help, as usual...


RED