I was just surfing and found this link. These are US legal HID upgrade kits for cars with sealed beams, so older 740s and 760s would be eligible. They're also pretty affordable at $599 delivered for the full kit.
Sylvania Xenarc HID Upgrade Kits
[This message has been edited by George@Swedespeed (edited 07-31-2002).]
Sylvania Xenarc HID Upgrade Kits
[This message has been edited by George@Swedespeed (edited 07-31-2002).]