I don't know of any cable that will do the job but I have used a M-Audio CO2 bi-directional converter box which costs around $50. I am sure that there are a number of other boxes out there that can do the job.
Not sure about the sound quality aspects as this was just a temporary solution for me. Lots of debate around the sound quality of various options but for right now I am happy with my glass optical cable from my mini mac to Bryston BDA-1.
Not sure about the sound quality aspects as this was just a temporary solution for me. Lots of debate around the sound quality of various options but for right now I am happy with my glass optical cable from my mini mac to Bryston BDA-1.