Well now you can make your own.
Things you need:
Potassium permanganate (PP)
used Co2 cartridge
mortar and Pestle
A small funnle
WARNING: PP will stain anything natural.Do not sniff,it will destroy your blood vessils giving you the worst nose bleed ever.
Step 1: Crush Up Some Sugar
Step 2: Mix It Up
mix VERY gentaly as it can ignite with presure.
Then very gentaly crush up
Step 3: Add Sparkiler
Step 4: Fill It Up
pore the mix into the cartridge.
fill the rest up with extra sparklers.
Step 5: Light and Throw
I made another yesterday and put to much sparklers in the mix,it took off like a rocket.