Thanks for that, a very useful company.
The car isn't with me at the moment, but when it's back I'll try and get a picture, otherwise it's a bit difficult to explain..
Basically the heater flap is on the end of a short rigid circular stub pipe that pushes into the heater box from the cockpit side. Apparently the stub pipes can be turned to direct air as required. Unfortunately on my car the pipes are a very loose fit in the heater box and won't stay put.
