I had mine recovered some time ago now by Auto Interiors, they used to do all the seats for Reve racing, cost me £50.00 which I didn't think was too bad at the time. Since then plenty of people have said about doing their own covering, buying the Alcantarra for a few quid.
I thought the idea of the stuff was that it stood up to water better than suede, I know mine's survived a soaking!