I've found this page at Regal
The kit for GTE 16v is £1010. It's at the bottom, the throttle body kits. Part of their plus points is
"Uses original equipment air mass meter, injectors, air filter box, ECU and throttle switch".
Are they any good because the SBD kit that I looked at consists of a new loom and ECU and would take a lot longer to fit than 3 hours.
If they were any good then I would definitely think about it.