This is what I've been looking for for my iPhone. (I had the same iPod as in your pix on a tuneflex. The whole thing got stolen when I left the care unlocked while camping with the boy scouts.

)
Here's my question, however: given the stiffness of the MINI's ride, is there enough support for the iPod to prevent mechanical forces (torque) from breaking either the dock or the connector on the bottom of the iPod?
I ask because I used to keep my old dock (before the tuneflex) in the upper cupholder (I called the metal parts a roll cage) and the dock's solder joints got totally broken after only a month.