What you want my friend are these !
Titan Roller Barrels, The 40mm ones flow the same air as a 43mm throttle body as there is no restriction when they are on full throttle...
They arent the cheapest things in the world....
40mm is really too small for a 2.0, especially when you are looking at a tuned 2.0
But the 40mm Barrels may give you what you want.
They are new to the market but I do re-sell them. E-mail / PM me if you want further details, price etc
What I can say, in a recent test on a 2.0 Duratec they gave 8BHP more than the equivilant throttle bodies and a tad more torque.
And for all the doubters, check last months Classic Ford with Colin Mcraes Ultimate MkII Escort in...... what was on his Millington motor ?.... WEBER ALPHA !!! If its good enough for Colin.. its good enough for me