H.U bracket size install kit

i have a 94 Z28 and does anybody know what bracket size number and faceplates fit the 94.im referring to the metra head unit install kit.i have no idea how to put it together and since they dont have my year on the guide i dont know.any help would be great.

40-GM10 - Gm factory antenna to aftermarket head unit

99-4544 - '82 and UP GM multi-kit with 1/2 DIN EQ option

99-3300 - Chevy/Olds/Pontiac 1994 and UP dash kit (flush)

99-3009 - Camaro/Firebird 1993 and UP dash kit (flush)

You have officially been hooked up :D!

PS: I hate this 90 sec. posting rule!

thanks but where can i order the kit.