John,

I have the same Kenwood .... that you do, but I still put the iPod directly into the ws-420, because I can't STAND the iPod controller from Kenwood. I would rather have loss of
fidelity, but ability to control the iPod (and iPhone) than total loss of control with the thing
from Kenwood - I had it - but sold it to someone in Alaska.

Todd

Let us know if you find that carbon fiber blank you're looking for, please!