I don't think any came to the US. No one here has seen one afik. The Gen IIs had them overseas as well. Gen III here finally has them of course.

Don't know how they piped the air ducts on earlier ones. Then Gen III has a lot of it designed into the floors, ceiling, and sides. TO retro one into a vehicle that didn't have could be a sizeable task fittings the ducting.

Big Truck: 00, 3.5, Endeavor, 5-Spd drive line in hand!
Little Truck: 87, 2.6T I/C, MT, LSDs, Tonneau Top
Her Truck: 03, 3.8, 20th Anniv, 65k
Daughter's: 06 Eclipse, Keeping it Mitsu!
FSMs: MitsubishiLinks.com