I've got the perfect slings for the project. They're made exactly like the Soviet slings. I initially thought they were made using cut down Soviet slings, but after finding a pink sling with the exact type of webbing, I'm convinced the webbing is Afghan. The hardware, except maybe the rivets, is Soviet. This is what I believe the locals are putting out for their own use, perfect for a Khyber build.
If anyone wants pics, I can't host them but will send them.