Well, you came to the right place. Lots of folks here (with lots of opinons) with plenty of help to get you through your build.
Try to connect with some of the local Cobra guys, and start exploring the various manufacturers. I looked for several years, and settled on ERA and their 289 FIA replica. Very happy with the product, and even though I'm yet unpainted, I always seem to gather a crowd of admirers.
Sounds like you really want to build one---if not, there seem to be plenty of used Cobras on the market right now.
Anyhow, check out
www.erareplicas.com. They are known for their customer service and the quality (and adherence to the original Cobra shape and lines---not everyone is, by the way...).
So, what's on the agenda? Big block or small block? 427 body style, or 289 FIA or slabside? Purist or mod?
Oh, also, go to
www.summitracing.com and order a parts catalog.
Have fun!
DD