bought the unit used from ebay for 50 quid
a new genuine trim think it was 30 pound
found a breakers with the air quality sensor, bracket and wiring plug he cut me enough loom for me to solder the wires to make them longer £25 delivered from a gtd mk6 golf
then I had to swap a few pins over and basic reset the climate control
hardest bit was fitting the air quality sensor had to remove wipers and scuttle tray
dan.