Bomelia,
Unique Motorcars is near you - its a good place to start. A fine product second only to an ERA
. Visit the manufacturer you are considering, beyond that Ron's advice is spot on.
You can get a Cobra anywhere from a very minimal donor car kit to complete turn-key. You have to decide (be realistic) what your skills and available time are. I started mine as an ERA roller needing only wiring and interior - but started a new job, didn't have the time to build it and switched it to a turn-key.
Hope this helps,
Jim