Just as a thought, how much are T190s selling for these days?
As has been mentioned, in their own unique way, they are actually a bit special.
Would it be an option to sell the T190 as it is and then just buy a Mk1 Focus RS? Around about £1000 of tuning to a Focus RS will take it to a safe 285bhp and the scope for further tuning is there in the future. It's got the better gearbox, brakes, suspension, engine etc.
Just a thought as to try and bring a T190 up to a comparable spec, you might find you're at similar money!