Inflatable pfd parts question.

I pulled a dummy move on my fathers inflatable, I tried screwing in the CO2 in without putting in the green safety clip, and you guessed it pssssssss!!! cold hand and a *@#$%@.

Now I do have the safety clip and wafer still in the package but no 33gm CO2.

Can I just buy the co2 or do I have to shell out another $16.00 for the whole new package (co2,wafer and clip)??

I did a little searching on Google and only found the kits in the US

That is exactly what I am finding

I suppose it makes sense to sell it in a package because if you had a activation on the vest you will need all three but you also have dummies like me that screw up that just need the cylinder.