There are some out there who love the EZ-Just handle design.
Well for those who do, here are drawings of the parts to make an exponential version. Cut out (or have them laser cut) the pieces from 1/8" ply. The links should be 3/8" x 3/32" Aluminum. Bolt through with a 5x40 x 5/8" flat head screw.
I don't plan to kit this one, but if anyone wants to, be my guest.