If you want a sic cog set up then a front hub with a new axle isthe way to go. There's a guy who sells them all ready to go on ebay and he has a website that explains it as well. Can't remember the name though!
Could well be Velosolo. They seem to be the only people selling them on eBay at the moment
Could well be Velosolo. They seem to be the only people selling them on eBay at the moment