[SilverMiner]

It seems to me that the OP is specifically asking about the passenger side vent of a rig with AC, which is considerably different than the manually operated vent found on non-AC trucks and rebuilt in the Restoring Rusty thread.

I've been following this thread because I also have a vent sitting on the floor of my garage that I'm wondering if I'll be able to reassemble. It is vacuum actuated with a fairly complex spring arrangement. I'm worried I may have lost critical parts, so my plan is to head to the junkyard once it warms up a bit and hope that I can find one there to examine.