If you do come up with a cool five-card version and it play tests well, I hope you will share it so people can try your variant!
I got a couple of ideas. Revenge which is just a counter to steal. You take 0 gold unless someone plays steal. If your opponent plays steal you get all 4 bars and your opponent gets knocked out of the next round.
Another is a pact or bribe which is kind of like share but instead your opponent gets one more gold bar however there is a pact in the next round. This pact is negated if your opponent picks steal or grab 1 and go. The pact is if you get eliminated and your opponent voted for you that opponent with the pact also gets eliminated.