Absolutely!
If you haven't already, always make sure you get a Divers Alert Network (DAN) Membership - (
www.daneurope.org/eng/english_.htm), look at the "insurance benefits" page, the link is on the left. DAN basically covers you for accidents. For £50 a year you get excellent cover which includes low-level flights to deco centres. Their website is cack and hard to use, but stick with it - for £50 it's a good price to gamble with your life!
For the actual trip, I used ScubaSure (
www.scubasure.com/) and I gave them a forum because of the treatment I received. Basically, I booked a £900 liveaboard trip to Egypt through Oonasdivers and got cover with ScubaSure. A few days before I had to go, I got an absolutely stinking cold, so there was no way I was going to be able to dive. Scubasure very promptly sorted me out with a refund (minus I think it was about £50 excess) - not only that they send me a nice big bottle of absolut Vodka as a get well present! ScubaSure to me, were incredibly helpful and getting my money back was a doddle. From my personal experience, I'd highly recommend them.
I can't remember exactly how much insurance from ScubaSure was, but it wasn't a lot, maybe £20-30. If you
pop into their forum and let them know what you require, I'm sure they'll give you a rough price. Our member
CharlieP works there
I try my best!