"I'm looking for yellow H2 Bulbs for my Projectzwo fog lights. Anyone
know of a vendor?"

Chris

You might contact: http://danielsternlighting.com/products/products.html
to see if the H2 they have comes in yellow? You're also going to see a
veritable library of information there and IIRC, your question about
brighter fogs is covered.

... and, although not quite what you were looking for, this place does have
yellow "kits" that you might be able to mod to put on your lamps:
http://www.stickercity.com/store/home.php?cat=1304

bob