Hi,
Bit of a late reply, but I have a standard AGP with the IHI turbo (albeit remapped and centre box deleted to bring it quite close to Esseesse power at 179bhp), and have bought a complete AGP Esseesse engine, gearbox, Garret turbo and ECU to hopefully drop in it one day...
Of course, I gather the Esseesse also has other mods such as uprated brakes, suspension, etc.