Delphinus,
I ordered it directly from Aquasafe.
When you go on EBay, look up reverse osmosis, you will find Aquasafe products, this will link you to the Aquasafe store.
Don't order throught EBay, just use it for product selection. If you order by phoning Aquasafe directly, you get a better price.
Aqua-Safe Systems Ltd.
5908 Marine Dr.
West Vancouver BC V7W 2S2
604-922-3030
anything@aquasafecanada.com