I've just bought a asus p5q pro and just realised it has a coax spdif out rather than a optical (which I need!)...yes I am a donut 
There's an optional extra for the mobo that you can buy to plug into the mobo to get optical out...but I can't see to find it anywhere and the manual doesn't give a part number...anyone any hints on where I can find it?

There's an optional extra for the mobo that you can buy to plug into the mobo to get optical out...but I can't see to find it anywhere and the manual doesn't give a part number...anyone any hints on where I can find it?