I am looking for a feat or alternate class feature that would enable a fighter to use improvised weapons while maintaining balance. If you are familiar with Kambei from 7 Samurai or Afro from Afro Samurai, they use their weapons with great skill, but when necessary they use improvised weapons to suit their needs.
I was thinking about converting the arena fighter of 4ed Dark Sun to 3.5, but I would like to use untrained weapons and improvised ones (ladders, pipes, bottles) alike.
Do rules for this exist? And if not, how can I create rules that maintain balance in play?