For Best Quality Parts:
www.Theretrofitsource.com
They have great customer service, quality parts (mostly new & so
e used), fast shipping, & great combo packages I.E. Projectors,shrouds,bulbs,ballasts, & all for a great price.
For Good Info And Also great deals on parts:
www.HIDplanet.com
Most of the users are always letting go of their parts for cheap! Also the site has great info on doing retrofits and great help.