Theres a guy that does some really nice retros, and while this is an early one, several years ago on his brother's prelude, he emailed me pics so I could see it..
Looks good, and his work in INCREDIBLE nowadays.
Go to
JWHITE'S LIGHTS - Lighting Retrofitting Services and the guy is as nice as they get too..
On hidplanet.com I met the guy, and people on there swear by him!
Check out his other work too, he's very proffessional, but keep in mind, the prelude is very early in his retro career.
MAIN POINT, he offers the yellow highbeam on all retros with separate low/high.