Digital Dilemma

Hey all,

I've got a dilemma. I just purchased an MSB LinkDAC III here on the 'goN. My problem is this:

My CDP (which I'll be using as a transport) has four different digital outputs. There are - AES/EBU, Coax, Glass Fiber and Plastic Fiber.

The DAC only has RCA inputs.

What is the best way to connect my transport to the DAC?? Is there an adapter? Do I need to have the DAC modified? Should I have the CDP modified?

Why can't anything be simple??

Thanks in advance for your help.