Edited
I would still say go for the Apexi, price from Andy F's web site for the APEXI Power FC ECU supplied fitted and mapped is £750. I would think by the time you get a second hand ecu and it mapped to your car the cost will be about the same ish if not more,that’s if it possible to use a newer ecu your car that is, I'm sure someone will be able to clarify that.
Phil
I think thats £750 + VAT phil
well spotted m8