you may want to try out @Nothern Garage in Sg. Ara ... the boss is very friendly and the price is very reasonable too (don't get scare off with some evos or wrx in the workshop)
I Have one unit Motec M800 ecu for sale . Complete with wiring harness(military spec wires) for Supra MK IV (plug and play), Motec Can Communications Cable. Advance function, Anti Lag, Cam Control, Drive by wire...