Any suggestions? Generic fit that might also hold an iPod would be a plus.

if you're UK based I got one from CarPhone Warehouse. It was designed for a Nokia phone but expands and contracts to hold all manner of sizes - I sometimes use it for my sat nav as well as my BB. Cost a few quid and fits on a vent.

Check out proclip, they should have what you are looking for.

just search proclip in yahoo

I never like the vent mounted holsters for any phone or mp3 player. Here in MN we need to have the heat on 9 months out of the year and I can imagine that would do some damage to a device over time.