neither have i and i dont think they do it, netherless pet insurances are one big con anyway. apparantley they only pay up to £600 of a vet bill and they dont pay straight away either, you have to pay for the vet bill out of your own pocket and then the pet insurance people pay you several months later. thats what i heard anyway. your better off putting money away each week/month for your pet and then when a vet bill comes up you got the money to pay for it.
There is one company that does insure exotic pets, but to be honest I wouldn't bother, because the monthly premium is more than you will pay for a small pet consultation at the vets anyway.
Reptiles are normally pretty hardy if you keep them correctly, but just be prepared to pay the vet if something does go wrong.
Sounds harsh but with reps by the you know they have a major (ie excessivly expensive) problem it's usually too late to help. Plus some vets (Such avon lodge on wells rd bristol) have a field day once they know you have insurance. You may be better off putting a few quid a month away in a piggy bank towards any possible future vets bills. Most of the time general check ups and never going to cost more than your excess anyway.