OH Never mind. I get what you're looking at. You want the Oppisite of the Red thing. Well it's actually very simple. The link you posted to adapt the pistol to a tank is actually a 3 piece device.
1. The Modified 12gr Cartridge
2. Braided High Pressure hose
3. The ASA (Air Source Adapter, THe black thing at the end)
You can take this ASA off the braided hose and you'll find standard 1/8 inch NPT male threads. Then all you need an adapter from that to the threads of your "regular" CO2 tanks regulator output.
Edit: Paintball has been my hobby for over ten years, I just started brewing a year ago. I love to see the two coming together.
Edit 2: Then you can get into "Micro Line"
and it's fittings
and you can change the length of the whole set-up
Edit3: Looks like this is it. HERE