NAS110 AC Box
When I was rebuilding mine, George, at Rovers Down South found one for me ($1800, ouch) but ultimately, I replace the entire bulkhead and dash with the 90 style, got my vents back and love the 90 dash, with parcel shelf much more.
The NAS was not the only one to use that AC, many 110s that went to the continent also use it., As a heater, it's equally inefficient, too