1.06 is probably too big for an H22 to spool up nicely. The thing about a GT30R on an H22 is that while it is in fact right in the middle of its efficiency range at low boost levels, you're really not making the turbo do much work at all. Better to stick with the .82 a/r for the exhaust housing.

As for where to buy it, I really like ATP Turbo as they were very helpful when I emailed them about some various things I was just curious about.