Dave,
I would say that it is a long-shot for somebody to hand over their keys to their pride and joy to someone they barely know to take off with it for several days. You're a one-poster, and haven't built up any trust in the community of Cobra owners. My first thought was, "Hmmm, how far is it from Palm Springs to the border with Mexico?" Race experienced? Makes me wonder what you'd feel comfortable doing in a borrowed Cobra (uh, and I don't mean "consumate", but who would want THAT going on in their Cobra?).
If you're serious, then let's be realistic: Google "rent Shelby Cobra Los Angeles" or something. Here's what I found:
Exotic Car Rentals New Selection- Rent New Exotic Cars They have Lamborghini's, Ferrari's, and yes, Shelby Cobras. I didn't look at the cost, but for your wedding...
We rented a Jaguar for our honeymoon, before flying off to the South Pacific. Loved it! Pure luxury. Go rent your dream car for your honeymoon, but with a proper contract and correctly insured.
Realistically,
Dangerous Doug