Internal chiller for sovereign?

[Stormcrow]

Has anyone here installed a cooling coil inside a sovereign fermenter? I would prefer to run lines through the lid without using the stopper hole because I'm planning on installing a tc port there. I'd also like the coil to get down in there low. Short of putting the fermenter in a fridge, I'm open to some other ideas. Internal cooling is my first choice though. Anyone done it, or know of a coil that would work for the project?