If it were me, I would take the full amount offered by the insurance company and allow the car to be deemed as totaled.
I would begin to search for a replacement car within the budget you have and with the money insurance is providing you.
As far as a new top if you find you need another one again , you can simply get another one through BAS international in the UK at the cost of only about 800 bucks shipped anywhere in the US.
That's not a very large amount to put into another purchase even if you pay $11,000 for it and I'm sure you can find a better price roadster, especially if it's a base model.
I wish you well, but that would be the route I would go if it were my decision.