I bought the whole set of different "security" bits & driver, cost me around $60 from Bunnings for Kinchrome brand a few months back... already used it in 3 different applications requiring "security" screw removal (including the AFM on my '99).

Great to have when ya need 'em...

__________________
MY99 WRX sedan WRC blue Sold :(
MY99 WRX sedan Dark blue pearl :D
MY97 Liberty Outback Ltd Wagon
1990 Mk3 Supra turbo fully rebuilt 7M-GTE (Older son)
1991 Celica GT4 (Younger son)