Not trying to take away the business from local resellers for parts for our cars but also take a look at www.takakaira.com.
They've got the Blitz after P&P to the UK including piping etc for about £600 I think. They've also got the HKS Type R for about £1100 (after currency conversion).
I'm going home today and taking the damn foglights out then...since it makes a huge difference! Thanks for the tip.
About the Supra FMIC fitting the Aristo, I had the same thoughts as to space in the engine bay, but I'm guessing it'd mostly be a piping issue.
Have you thought about picking up a Spearco FMIC from the US (online retailer) and just having the piping custom made...since majority of manufacturers (HKS, Blitz, GReddy, etc) use Spearco cores anyway? It's a much cheaper alternative to be honest...I'm thinking of getting it done and having the pipes made by a local exhaust company. If interested let me know I'll post up the links to the Spearco IC's :).
About the Oil Cooler if anyone can help it'd be much appreciated as I've got a link to some "generic" ATF/Oil Coolers (with temperature controlled FAN) that have been getting positive reviews on ClubLexus USA & Supraforums USA.