Hey Wortgames,
The easiest way to go would be to get the filter kit from Craftbrewer. The most important part is to get a 1 micron absolute filter, you could get the housing from anywhere but it needs to have a release valve otherwise air/co2 will be trapped inside the housing.
A quick search should also bring up heaps of info.
Cheers
Jye
Hey Ross
How does your filter cartridgecompare to this one?Clarence beer filter i.e, what's the difference mate?