Have a look at the HeyOk lighting controllers that RC4WD are now selling.
http://store.rc4wd.com/Brake-Reverse...er_p_3131.html
This particular one has several outputs, you can have an always on for headlights, a switched output for driving lights that comes on with forward throttle, the tail lights are dim while driving and are always bright for brake lights with the throttle in the neutral position, and with reverse throttle the reverse lights come on.
You could always just ditch the switched front output and you have always on headlights and tails, with switched brake and reverse.
They've recently started selling their products and they have a few different options for lighting modules.