So I have decided not to go down the itb route as boosting and itbs together will need a motec and I cant really justify 2k on an ecu right now.
These came of a corolla a111 and are the right size. They were all balanced up so shouldn't need to much tinkering to run as long as your adapter plate is properly made.
I found an adapter plate here http://www.xcessivemanufacturing.com/ON ... =4&pid=306
They are in america so it comes to about £200 plus shipping which isn't that bad.
If you don't trust them though (the site does look a bit weird tbh) I CAN fabricate an adapter plate but I will need the rubber piece which sits under the inlet manifold to copy, I can't take mine off to copy as I need the car driving. It will take a few weeks to make and will need a deposit to get material in for it.
Throttle bodies on their own £100 + p&p
Throttle bodies with plate £300 The adapter plate will be machined to make sure they are all exactly the same height.