The Malkoff Quad is one. Check out Elecktrolumens as well.
You might want to consider a matched cell pack for a 2D instead, all the links and info you need can be found here. This works well for me with the Quad.
Any drop-in that takes 6 batteries(9v) would work.
Not sure about floody though. Maglites are naturally throwy when focused. You would probably need a diffuser, textured reflector, or a different reflector.