Camping cooker gas canister in Port Vila?

Hi, I'm trying to find out whether standardized camping cooker gas canisters are available at some shop in Port Vila, and I can't see this question answered in any other TT posts. I have a regular Optimus Crux that I'd like to take, but of course I won't be able to bring the actual fuel into the country on an international flight. Thanks a bunch if anyone has info!
http://www.campsaver.com/crux-w-terra-weekend-he-cook-set

I'm not sure why you would go to the bother to take a camp cooker, as there are few places could camp anywhere in Melanesia, and if in villages, the locals will provide and cook food f.or you

Thanks for your reply, Ozziegiraffe. We're planning to spend several days in one of the few places where you can camp - on the Ambrym ash plain (with a guide, but no villages around) - and having a cooker would allow for boiling rain or spring water or the occasional warm meal.

Why would you boil rainwater? I have never suffered any ill effects from drinking properly collected rainwater without boiling, filtering or treating it. In some places that's about the only water available.

There is a gas shop in the main street on the uphill side.

H2ooh (what a fitting name for this question :-)), I should have been more specific - we probably won't be "properly collecting" it but rather getting it from some run-off streams or so. Honestly, I'm not exactly sure where we'll get it from, so I just want to be prepared. And then there's the cooking - just carrying rice to boil in rainwater could save weight in our backpacks.

uncle_sav, thanks a lot for the tip! Any idea whether they sell fuel canisters that fit the standard size they sell in Australia or North America?