What about inside the console compartment? There's a little rectangular panel that can pop off for adjusting the parking brake cable tension; you could mount the switches there, though they would be a little annoying to get to.
Maybe fabricate a small panel that attaches to the lower part of the dash? Could make it out of aluminum and paint it up to make it look nice and mount below where the headlight switch is.
2013 Grabber Blue V6 Premium auto | MCA | Performance Package | BMR/Shelby Panhard Bar | Steeda Rear End Links | BMR Rear LCAs | JLT Oil Sep | FRPP Diff Cover | DSS Aluminum Shaft | Adaptive Shift Delete | Cervini Type 4 Ram Air Hood
Order: 10/13/12 | VIN: 10/19/12 | Sticker: 11/3/12 | Build: 11/30/12 | Mine: 12/22/12!
Restoration project back on the road: my dad's 1969 Camaro SS 350