Jon,
Start by going here and buying the book.
http://www.cobracountry.com/cobrabk.html
Then decide what's important to YOU: ie. degree of authenticity, IRS vs. solid axle, donor vs. non-donor, etc. etc., etc.. At that point, you'll be ready to contact some of the manufacturers for their info packets.
If you hang around here awhile you'll see some patterns. Also, if you "search CC" for key words like manufacturers names and "quality", "recommend", "cost", "problem(s)", you'll find there's a wealth of info if you're willing to dig a little.
Good luck,
Lowell