Anyone know the brand of traction bars? Any good?

Chrysler leafs have a shorter front segment. That's what makes them different.
Clamp the front to make it even more like an arm, and/or add a half leaf.

Yes a slapper bar with a bumper can be used. @CPDave used them on the Zebra Dart for several years. But around 2010 switched to Afco leaf springs with an additional half leaf and found it a better setup.