Matt (ford9),
To answer your first question:
The Green Hornet is a true Shelby, the only 68 coupe made, it is one of a kind! It was suppose to be destroyed but I don't know if that question was ever answered why it was not. Like I said it is in both the Shelby and CS registry. Very unique
As for parts, look under the post by yoyoyo, I believe he just got in a bunch of fiberglass parts, I don't know if they include the front portions but he may know where to get them. They do still have original parts for Shelby fiberglass but it is way TOOOO expensive to do. There is alot of repro parts available. You would need the hood, front end fender extensions (also know as buckets), the lower grille, and a few other fiberglass parts for the front.
As for the Marchal lights, look at the glass, it should have these words on it:
above the cone (center of the light) should be the words FANTASTIC
two sets of numbers near the bottom, IGM-164ZPN and K11123-N14cM AUF5m and SEV
From your picture they look like they are original Marchal lights, they may be 652's 653's or 656's as for the look, they look all alike from 2 feet away, you would need to get within 2 feet to tell the difference. I would not worry, a good pair of used Marchals can go for more than $400-500 dollars. Unless you know where to look.
It may cost you some to make it a Green Hornet, but I think it would be a very cool looking clone and since you already have the back half of the car done, you already half way there. ;D
Doug