Hey
Thanks for the replies... Just hoped on the off chance someone may have one floating around here not being used, but oh well life goes on
Mitre10, repco etc etc sell the disposable bottles... they are about $45-89 depending on what gas is in them etc etc.. from memory they are 390gm and soda stream is 250gm if i've got the remember correctly.
For the disposable they want $100-150 for the reg for that too

I have actually got the use of a big flash 3 phase mig welder now (which is awesome of the guy to offer its use for me providing i pay gas and wire) so will use that for bigger jobs
And I have discovered a guy on trademe with what i think is the best option for me at the moment (other than using the big one) Assuming he still does them...
http://www.trademe.co.nz/Business-farming-industry/Industrial/Manufacturing-metalwork/Welding/auction-131945275.htm (Expired listing)
He sells 390gm disposable co2 bottle complete with regulator for $40 reserve, and then he said he can do extra bottles for $17.00 each. Considering they are close to double the size of a sodastream bottle (which i thought was about $10 to fill) works out similar price

(And the thought had crossed my mind as to if it would be possible to refill them off a big cylinder)
When i am done with it and upgrade i'm sure i can get the $20 back for the reg
