Hi eberre,
The application may be a little unusual but the roller door itself is a normal residential garage roller door that is widely available through manufacturers such as B&D Doors and Openers or Airport Doors. If you go through an installer, they may also recommend other brands that they commonly work with - make sure motor and door movement are smooth and quiet. Usually available in standard Colorbond colours but custom colours / finishes possible with additional cost.
regards,
Fooi