Parkway is your best bet. The kit has been revamped to include the new intake from Ford. The front cooland crossover is made from aluminum. No more cracking! The rest is still plastic so be careful with that nitrous!
Then there's that guy in Texas who does the porting on the PI heads for $400. Some guy named SD Wheeler............
Rumor has it he's also a dealer for ProPower and has their entire line of ModMax components in stock at great prices.