This may be a dumb question, SWIM would rather be dumb than sorry.
SWIM has found an online source which will ship to his location who sells Nitrogen tanks.
Here are the specs.
Quote:
This tank is perfect for Guinness! This is a mixed gas tank featuring a siphon tube that extends 3/4 down the tank. This siphon tube ensures that gas is maintains the correct mixture needed for a perfect pint of Guinness. This Nitrogen cylinder is produced from high strength aluminum alloy. Enjoy the benefits of aluminum tanks – lighter than steel tanks, and do not rust! A nitrogen gas regulator is required.
In stock and ready to ship.
Features
<LI class=product_section_list_item>Made of high quality aluminum