ipod mounting brackets/other car ipod ideas?

the mod that I am planning can be done with an additional switch, to allow the use of the cassette player or aux-in. However, since I never have and never will use the cassette player, I’m not going to bother. I wont need to have a cassette in the player to use the aux, either. Other than saying “Tape” on the SID, it should be transparent.