Julian. Don't waste the $$ on the iDrive. It doesn't really buy much room (and I was told they are not as robust by one vendor). My conventional opener hangs BELOW the door (as does yours, likely) and thus has no impact on clearance to the ceiling. All you need is the track and a modified bar that attaches to the door to pull. They are not uncommon. Check the maker of your door for the correct track, or call a local Garage Door install/repair company to have one fitted.
PANTERA INTERNATIONAL
A DE TOMASO CAR CLUB
Presents the De Tomaso Forums
The On-Line Meeting Place for De Tomaso Owners and Enthusiasts From Around the World
Clicking on the banner will take you to the sponsor's website.