Just finished what I should have done in the first place. I used the 08 stock D1S bulbs and ballasts in my 08 headlight assembly retrofit. Believe it or not...if you buy the 08 assemblies and they come with the bulbs...all you need to make them work in a 05-07 WK....is a HID relay harness!(you can get them for $19.95 fron dxhid.com) I also used liquid tape(awesome stuff), electrical tape, heat shrink sleeves and plastic ties.
I have many pics below...so if you have any questions...please include the pic #. But...this is very, very easy.....and if I can do it...anyone can.
#1-this is the back of the 08 drivers lamp. The power and ground for the ballast is circled in red with the arrow pointing...
#2-tools and supplies needed
#3-d1s bulb plugged in
#4-d1s bulb installed-
#5-on the passenger side lamp...there are 8-10 wires going into the lamp. Just pull the rubber stopper out and trace the wires going to the ballast. On my lamp...they happened to be black(ground) and dark grey(power). the drivers side just has two wires going into the rubber stopper...they are also grey and black.
#6-In these pics....I stripped the wires and connected the relay harness to the lamp. On my harness I had to cut the plug off that went to the HID bulb(9006 kit) and then I wired the green to the power and the black to the ground...which then I connected to the fender grounding location. I used the liquid tape on the open wires and then the heat shrink tape on top of that. I then plugged the relay harness into the 9006 plug from the truck harness and routed the relay harness to the positive on the battery. the drivers side is the same procedure.