Mark,
The fuel block is available from Magnuson for a fairly low price (less than $50 if I remember correctly), the exact cost I don't remeber but I checked earlier this year when a buddy was considering buying a used setup for his H2 and needed the block and the 42# injectors.
http://www.frozenboost.com/index.php?cPath=217&osCsid=5e37fdaccc6d0c4cc463764 229b81287
With regard to the intercooler I have seen people use units from the link below good results.
On another note I had my radiator let go last month, which in turned smoked my transmission and made a mess I don't want to ever see again. Earlier this year the exact same thing happened to my dad's H2 that has the same supercharger setup. I now run an all aluminum unit and a larger external trans cooler bypassing the radiator with good results. I would ditch the factory Delphi radiator ASAP or at least bypass the trans cooler lines running through it.
Tom