Where can i get panels like this

[sphelps]

If you want it done right you'll need a separate vent, as just tying into another vent might not work too well seeing that you might just end up venting the humid air from the tank into the bathroom. If the tank is on an outside wall which I seem to think is the case then drill a hole right through the wall, easy!

Otherwise keep the tank open, as in not in-wall.