Taken from my 95 RZ TT, I have a HKS FCON V (the silver one) with wiring harness for sale.
The fact that this is the silver FCON V (not the gold 'pro' version) may mean that there are limited companies in the UK who can map it for you.
Possible companies in the UK could be TDI (not sure if this is their website) or Hypers Sports and Racing in Wigan.
:: I have no idea if the unit is locked/password protected.
:: This FCON V unit comes with a built in FCD
:: This unit is for Turbo'd (2JZ-GTE) manual transmission (no good for autos) models.
Due to the possible difficulties getting this mapped, Im not going to ask for x amount - so just make me an offer (preferably a cash one, I won't accept magic beans lol).
Edit
I dont have a manual for the FCON, basically one end of the field harness plugs into the ECU, and the other end plugs into the original loom (that plugged into the ECU).
A HKS tuner should know the rest