Here you go, this is a Home Depot special. The 24"X4" round tube will actually make two of these intakes, and I used electrical tape to make a good seal. All told, about $3 invested in this intake:
http://community.webshots.com/album/129795368SUkqHV
HTH -
DJ
'94 K1500 5.7L TBI RCSB: Hotchkis F&R Swaybars, Bilstein HDs, HPT Spacer, Dynomax exhaust