Headlights
My home state of SD, which is usually pretty lax on laws pertaining to cars has a minimum height spec. of 24" to the center of the bulb. Every single good looking fixed light conversion I have ever seen (and mine, which looked bad) was not legal because of this. Just one more thing to consider.
Perhaps the headlights from one of the Porsche's, 944's I believe, where the flip-up light comes up in the back instead of the front could be adapted? Otherwise, the hole where the headlight mechanism is is certainly big enough to fabricate a filler into with the regular flip-up lenses from anything you found an a junk-yard. Do it right, and if you decided later to go back to the roll over lights you could.