[Skunkworks] Where can I get genuine HP cartridges & toners?

Hi guys, I am tired of buying fake HP cartridges & toners :-( Some of these fake ones even have those marks/holograms that are meant to show that they are genuine...but they are still fake and they are messing our printers! My boss is not amused! ...someone tell me where I can get genuine HP cartridges & toners... I am in the CBD. Claire.