Welcome Benny! In October, you should come join the Mid-America Cobra Club (and lots of other vintage sports & race cars) at the Lake Garnett Grand Prix Revival (
Lake Garnett Grand Prix Revival Home Page) in Garnett, KS. It's a weekend full of fun. We have a number of other guys from OK that you'll meet as well.
As far as insurance, I found that the cheapest was through my local State Farm agent. They were half of what all the specialty insurance companies quoted me with very similar stipulaions and an agreed value.