I've never heard of one peice headlights Never ever seen it. I have diamond cut lights with black housing from procarparts.com....I looked forever for headlights and never found 1 peicers. (or at least I dont remember finding them) I think 1 peice headlights, if done right, would look very hott.
The headlights are on Erebuni's website on the 307 kit. It;s a one piece headlight for 94 - 97. I wrote them and they said they are GTS covers but I looked and know way these are the baddest set of headlights Ive seen.