Why not try the iP-BKRCD? It is wired, simple to install, and it will charge your phone as well. I used the one for the CDR-220 and couldn't be happier. Took all of 20 minutes if even that to install. As mentioned by particleweave, route the wire through the shelf and you have a nice clean install.
Here's the link:
http://www.discountcarstereo.com/iP-BKRCD.html