This home-made shifter,I came across at the German bikeforum. It's not a jockey shifter,but an awesome piece of art. It's a Nexus 3-speed twistgrip,mounted on the "tank" of a Felt bike. And it looks like a gastankcap.
i used a cut down shifter from a ford transfer case. start looking in nonobvious places for ideas and parts. while i was out riding trails the other day i found a wrench that was the perfect shape for a lever for a hand brake on my murray