Gen1 Vortex will fit the Gen2(if you find a good used set), and adjust back and up.
The Gen2 Vortex has 2 versions, the early ones adjust back and up.
The later version(last year or 2)adjusts back, down, and up.
As far as I know, all require an aftermarket rear brake light switch(around $20).
I wouldn't worry about the brake light switch anyway; how often do you stop with only the rear brake, let alone use it very much?