I got the Motrax deluxe cover from here
http://www.motraxdirect.co.uk/acatal...html#aMTXMHBC1 got a free helmet bag as well which was good.
I use the chain to keep the front down and a bungie around the back wheel, it comes with a clip for the bottom (we suffer with very high winds in cornwall, my old XR125 kept on getting blown over when the old cover started acting like a sail).