Factory under dash a/c ?

[ron lechman]

I found an under dash air self contained air conditioning unit installed in a 1972 Jimmy located in a wrecking yard. The fans works and I bought it for $50.00. I would like to install it into my 69 C10. It looks very well made and has a nice metal Jimmy name plate on it.
I'm wondering if this is a GM product that was offered by GM parts department to retrofit non-ac vehicles or an aftermarket unit.
Does anyone have information on a unit like this?
I'd like to change the Jimmy nameplate ( 1" X 6 1/2 " ) to an appropriate name plate for my 68 C10 and a couple of the outlet vents are damaged and need to be repaired or replaced.
Can anyone help with that?
I've attached a few pictures of the unit.