Using the intricate science of eye-balling-ology, it appears all of GSP's intake mani's drop the TB in the same place. I'd guess that the greddy style IC kit would work, with little to no modding. I believe RawBrokerage recently came out with an RB25 IC piping kit thats made to work with the G/F/Xreddy style intake for $300. Ought to work for the 20 and the 25 (correct me if I'm wrong, ppl)
http://rawbrokerage.com/Raw-Brokerage-F ... ICP25G.htm They give you the option for the stock or q45 tb, and stock or upgraded turbo. Seems the way to go. Ebay also occasionally similar stuff ish, but I'd feel better buying from a reputable nico sponsor

than ebay.