I didn't think I should start a new thread on this - so I'll just add to this one.
I never even knew of the "Special Build" IS-F until I visited my Lexus dealer today for some wiper refills.
Anyway - if anyone is interested, one of the Special Builds is still available (new, not used) at Highland Park Lexus in Highland Park, IL.
I saw the sticker and the package adds $12k to it - I was like, wha??? I thought the only option was the Nav package.
They also have an IS-F in blue on their showroom. Ahh.. maybe in another life I'll be lucky enough to have the $$ for one.