Look in the BST threads here and others for a used one. You can also check eBay, but I'd say your best bet is on the forums.
Since you already have the loader, you might consider looking into a regulator and HPA, if you only use Co2 at the moment. Reason I say this is that higher rates of fine means you take a chance at sucking liquid Co2 into your gun, which isn't really good for your equipment.
Never argue with an idiot; they'll drag you down to their level and beat you with experience." ~ Anonymous