I am using a Lucas 3-phase rotor with a Podtronics regulator/rectifier. Works great. It's a little larger than the Tympanium, but since it is housed in a larger finned housing, does not need a large heat sink to mount. The Tympanium is to be mounted on a surface which can function as a heat sink.
I have heard good things about the Sparx 3-phase system. I am skeptical about their output claims, as if you look at their comparison charts, the Lucas 180 watt shows 196 to their 220 watt unit's 215. Sparx also requires resistor caps or plugs. I don't use them with my Podtronics set up and so far, no problems.