That's a very odd cage...first time I've seen one.
With your hard top on, it looks more or less like a standard 110 except for the overhead bars coming from the A pillar and appear to come down through the roof. My advice: buy a standard Exmoor top and have an auto upholstery shop modify it to accommodate the overhead bars.
Another option is to ditch the cage and find a Tithonus/Wolf cage and get the military PVC top from Exmoor. That's what I did: http://www.defendersource.com/forum/...tml#post652443