Webb Roller Doors sell them also. They do the Glideroll doors. ( I have no connection). I recently bought a Golden Oak Elec Roller door off them. It is not insulated though. It cost around 1300 inc. brushes & 2 remotes, * installation. HOWEVER...the door, etc is great but the delivery time was over 2 months so be warned. Most of these companies buy them in from abroad made to suit your size opening.