Here's the harness:
http://www.amazon.com/Putco-239008HW...+harness+putco
I don't believe they list it on their website anymore as a product, but I got it on Amazon brand new and it's sold on many other sites.
So I installed the harness, it was incredibly easy to do. However when I have the car turned on and it's in Automatic Light Control mode, the resistors are buzzing like I did something wrong and the lights aren't very bright. If I turn the headlights on manually, they work fine.
The weird part about the setup is that Putco gives you a plug on one side to plug the original harness into. But on the other side you just need to leave it hanging there. This is where I might have messed up but I don't see any other solution. Anyone else have this issue? Let me know if you need photos.