Elephant won't insure you when you drop more than 5cm.
Best to do everything online, when I put my exhaust on the insurance they wanted 60 quid on the phone, on the net it's a fiver!
Try HIC - 0845 129 0290
They don't charge for non-power affecting mods.
They beat my quote by about £300 when I was a few years younger.
They work on comission, so ask them if there is anything they can do to beat the quote (and always ask for the same person), also say you're a member of an owners club, I think they do discounts for that (they used to anyway).