harness bar
#2
I have a stable energies bar, and I really like it. http://www.stableenergies.com $99 for either a B or C pillar bar.
#3
I'm not sure if you read some of the other threads about harness bars, but a lot of folks don't like them and some regions won't let you use them. The Redline rollbar is the best solution. The debates center on 4/5 point harnesses in a car with no rollover protection, and the correct routing of belts with just a harness bar. All agree you can't just run your shoulder straps to the bar, they need to go all the way to anchor points in the body somewhere.