I used this unit -
http://www.signaldynamics.com/products/Modules/turn.asp - then bought a momentary on-off-on switch for turn signals and a momentary push button for e-flashers. Works great and keeps an "authentic" look to the dash with the switch and costs a bit less than the column mounts. Trust me, you will want the self canceling feature. Can't tell you how many miles I've driven with my blinker on.