It doesn't show up when searching. Maybe it's just me but I haven't been able to locate it under any of the tabs, either.
MC-5101
Firework Rocket not showing up in creative inventory
Resolved
Duplicate
0
Jordon Lowndes
(Unassigned)
Unconfirmed
Minecraft 1.4.6
Retrieved
Duplicate of MC-4597 , please use the search function to see if your bug has already been submitted. Currently over 35% of tickets are being closed as duplicate.