I have a used, but excellent condition heater matrix from a J-spec TT, (but will fit all models) as I replaced my entire cooling system last year. These cost over £200 for the matrix from Toyota.
I am offering this for sale, fully fitted, for £575 which will include replacing the 2 heater hoses under the bonnet if neccessary.
All you will need to do is regas the airconditioning - Ibrar is about 20 minutes away and does an excellent job.
The job will take 2 - 3 days depending on the weather and I live just outside Birmingham.
Any questions, PM me.
Rich.