Your yellow pages under Doors.This sounds like a commerical door(almost like for a refridge)Hey if you cant find it there, try the local junk yard(not for a Dodge caravan door,Although wouldn't that look cool in the front room?)But a salvage yard might be something there.Been in the bussines a few 24 hrs,never have seen a door like that in residential(doesn't mean they don't exist).Keep us posted Nikki.Luck