This the one I bought, and it doesn't require the use of a cup holder or air vent. The description says it is
for "smart phones" but my RS Pro96 fits fine: Arkon Mega Grip
Scosche makes a whole line of car holders for different items (ipods, gps, mp3 players). I have bought several from truck stops and walmart does carry some scosche items. also pro clips has a good line of specialty car holders.