Montage door handles from what donor?

I am trying to find the donor for the Montage door handle. I know its a GM but can not find the actual matching vehicle they came from.
Lots of very similar from 1988 C1500s but the mechanisms behind is not the same.
I did find the ignition switch for the Chevy tilt steering ACdelco C1448.

Attachment 1249

You're looking for a Datsun/Nissan 280zx assembly.

Amazing, I would have never found that. Thank you DMac!!