Hi Mark
Unfortunately the powerfc is no longer made and very hard to get hold of. Also you are right that the powerfc is made for the jspec community meaning that is it built to run on a Map sensor based system so won’t work on a UK. (Could be made to easy though if you do come across one)
The link ecu's come in 2 formats, Link g3 Lem and Link g3 Plus
The link g3 Lem is the cheaper model and can be brought from Thor who is the UK distributor for around £520. With this Ecu you would have to run a wasted spark setup and grouped injection. It works fine on the supra and I have used one on mine up to 1.2bar with no problems with miss firing meaning that a dli is not needed but there is a slight problem with the acceleration enrichment side of the LEM ecu when running on a supra and I have got link fixing this at present with the plus this is not a problem.
But if I was going to fit a standalone ecu to a supra it would be either a link g3 plus or a Motec m600.
The link g3 plus is on par with the Motec m800 and I feel it’s the way to go with any big power cars I am now asked to map and suggest ecu. It runs fully sequetial injection and coil on plug producing a more efficient engine, better mpg, more responsive and no problems what so ever with injection break down at stupid boost levels.
Any link g3 ecu can also control boost and very well so you could sell your current controller and then its just £35 for a link boost solenoid and then either a volume knob on dash to control boost or I can set a switch for high and low mode .
I have actually made some plug and play looms for these ecu’s on the supra now
The ecu’s can control air con, water injection, intercooler sprays, Warning lights, shift lights, Antilag, Launch control, flat shifting and the list goes on but on the link g3 Lem you are limited to how many of the above you can run with the plus you could have switches everywhere for what ever you like
Another good thing about going with the link ecu is that they come with their own map sensors so you can then convert your UK spec maf setup to a Map based setup which is the way to go. Bye bye MAF
HTH
Look here for more details
http://www.linkecu.com/products/engine-management/Wire-In/wire-in-home
also what about this
http://www.linkecu.com/products/productspageimages/displaylink806image.jpg
see here
http://www.linkecu.com/products/TuningTools/DisplayLink
Ryan