Van Specialties is the other one I’ve seen I believe they run about $800 so if you have good carpeting skills you should be solid. I really like the one stewco makes its pretty trick check the ccv YouTube video.
Sounds like you're looking for a door pantry. Both Sportsmobile and Colorado Camper Vans (CCV) offer these for sale (as well as other custom camper venders). The most recent one I saw from CCV is going for around $1200 and I'd guess others are in the same range.
Stewco manufacturing makes them for ccv check them out
Phish, I didn't realize CCV was outsourcing those cabinets. Stewco obviously has put a great deal of thought (and work) into designing those units I'm impressed & at $800 the price seems good considering all the required machining and quality hardware