Steve,
As far as I know, the three wire dimmer kit is not yet available. I'll send Dale Wheat an e-mail to see if he has an ETA. I'll let you know what he says. The only downside to the four wire version is, you have to convert to dual contact bulb holders, so that all the LEDs can ground through the dimmer.
Speaking of quad headlamp kits, I see Hella's now selling 90mm LED low beam and High/Low beam modules. Apparently, they are better than the 90mm Xenon and much better than the 90mm Halogen. The price, however, is about $780 each. Ouch! I'll stick with my halogen modules until the price comes down.
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