So I put a call into Sylvania customer service. The dude on the other end of the line knew as much as I do (not much)...
I managed to get a part # 9003/HB2 which is for the ZXE Ultra bulb (blueish tint) for the head light. -2008 FLHTC E-Glide Classic by the way.
No way in the world to get the part # for the passing lamp bulbs for the same ZXE bulbs... The guy had no clue.
Don't really care if they've got a "blue'ish tint" I'll settle with really bright white. I do not want to go HID !.. Just whiter bulbs (or blue'ish)..
So if the manufacturer doesn't know who does,?... Dave ?...