Purchase a 5 tube rollbar and add to it from Kinetics:http://www.kineticvehicles.com/parts.htmlhttp://locostusa.com/forums/viewtopic.php?f=23&t=12684
Or purchase your own full design from Jimmy at RollCageComponents.com . Just give them a drawing of what your car needs. A few of us have purchased our roll bars this way.http://www.locostusa.com/forums/viewtopic.php?f=19&t=6352&p=72079&hilit=roll+bar+jimmy#p72079http://www.locostusa.com/forums/viewtopic.php?f=35&t=4145&p=72061&hilit=roll+bar+jimmy#p72061
Every Locost chassis is different as are the desires of the builder. If you want a full cage, you'll either have to design it yourself or hand off the chassis to an experienced frame builder. The basic plans are in the appendix of most major racing organizations. The requirements may change depending on your intended use/class. I did the hand-off process on an older Formula Vee chassis to get it into current compliance.
“Any suspension will work if you don’t let it.” - Colin Chapman
Check out my rotary build log: click here