No need for a kit. Just get 6000k bulbs. I have to warn you though, mine didn't last worth a crap. I had 8000k from 2006-2007. 6000k from 2007-2008. I just broke down and bought OEM. Comes with a 2 year warranty.
Since you're looking for more blue, you need 6000k. 8000k is barely above halogen projection.
The higher the kelvin, the lower the light projection. Stock (4300k) has the best light output.
Bulbs can be bought at
www.jlevisw.com