for throttle bodies i contacted these very very gd price 1500 quid supplied fitted and mapped wiv a stand alone ecu. pick ur car up at cost price 2.

http://www.mtechautomotive.co.uk/throttle-bodies/

but yes iv over zetecs running wot ur plannin so dnt see a problem other than ur'ss need a adapter plate for the throttle bodies.

pepperperformance sell em. they r a kit car company but if u ask them they make 4 normal cars 2. ie longer in let manifold.