Being the agents for Star Jez and Paul at 2nd wind should be able to help you out. lternatively if you can't find one, SAILS & WINDSURFING CENTRE in O'connor should be able to make one up for you.
I have recently bought a gun board bag from windsurfingsales - looks the business and is well made and fits the dimensions of my naish board (which is similar to the evo's i think). 10mm thick and not too expensive.
If i buy a new board, she will always live in the warmth of my house and sleep on the spare bed. Until i pop her cherry, then it's off to the rack in the garage with the other slxxs.