If you have two cars, you will need to work up a no claims bonus for each car.
You can't share a no claims bonus, no matter how many cars you own, but you may get a discount for insuring two cars with the same insurer.
I would call round and ask for a better quote, some companies give discounts for multiple policies.
You could also do a fleet insurance policy eg here : [broken link removed]
Alternativly, if you have an OH or someone else in your family, get them to be the main driver on a new policy and have yourself as a named driver.
Another thing that may work is simply calling your insurance and chance over onto the jeep when you need it, since you mention very little mileage.