Zune HD audio cable?

Does anyone know if someone makes a cable for the port on a Zune HD to RCA connectors. I would like to be able to listen to the HD radio through my system. I would rather not use the 1/8 mini jack if I don't have to. I know that this unit is fairly new and not as common as an Ipod. Thanks for any help you can give...Rich
Check out the Zune docks. http://www.zune.net/en-US/products/z/zunedockpack/details.page/
I just bought a new Zune dock for FM listening but the output is nothing but a hissing sound via its AV ouput. I used the $9.00 RadioShack cables thru the Zine phone jack then Fm stations sound pretty decent.

I no longer have the Zune manual, Do I need to reset something on my Zune 4gb ?