Play Asia has two different versions of the VGA cable-- one without an optical out, and one with. I bought the one with the optical out, since I have a surround sound system. If I understand your question right, you should go with the same one I got.
Here's the link:http://www.play-asia.com/paOS-13-71-...n-70-178e.html
It says it's out of stock at the moment, though, unfortunately. It was the same way for me when I ordered, and the wait wasn't long, but I don't know what it would be this time. I was able to play using the component cable while I waited.
I just use the same optical cable for the VGA plug that I was using for the component plug. I didn't need a different optical cable.