Another option is making the system up yourself based on the sanden compressor.
I already priced that out for my crew cab. It was cheaper than vintage air for the same stuff plus separate rear heat/air controls and vents.
Been a minute since i replaced the housings on mine but
The inner housing uses these screw clips to attach to the truck. The exterior housing (the nice looking part) screws into holes on the inner housing.
And yeah they should be marked LH RH
The most environmentally friendly thing you can with a vehicle is use it as long as possible. Hopefully they figure this out for you guys.
No emissions out here in rural VA