Not sure I understood you, but i think they do all the swicthgear for the dash, and they can do the vent knobs (you mean the control that connects to the cold air vents on top of the footwells?). I think its about $40ish for the pullcord with the knob assembly + delivery but i may be wrong. best ring hawk to confirm those things, as I'm starting to sound like a used car lot salesman. the rotary knob i mentioend above.
if you want any more details i am happy to follow up this side of the pond. I'll copy this thread onto the UK Cobra club site
http://www.cobraclub.com/forum/snake...tches-etc.html to see if that helps up the numbers.
Kevin