I finally came across my notes on the levers. They are made by AutoLux 1-949-493-5578. They are called Duralevers.
We have replaced a number or 108 cars levers with these units, from the outside in a minimum amount of time but I, personally, have never done it anyway but with factory levers.
If they can't provide the instruction sheet give me a buss and I see who here has done it before.