Tele Buddy

this could expand a quiver easily
http://telebuddy.ch/

Nice.  Typical Swiss precision and execution, and of course, corresponding price.  Based on $ alone, it's just as thrifty to simply buy used bindings, if that's what's limiting your quiver.  (That's what I did for my last 3 pair of bindings...)

I use Quiver Killer (http://quiverkiller.com)  inserts on all my skis, so I can swap bindings around easily.  All my bindings have the same hole pattern, (voile, G3, BD) and I scored a mounting jig a few years ago, so very easy.  I can move the free pivot bindings around depending on which ski is headed into the back country.  They work great.  

K man wrote

I use Quiver Killer (http://quiverkiller.com)  inserts on all my skis, so I can swap bindings around easily.  All my bindings have the same hole pattern, (voile, G3, BD) and I scored a mounting jig a few years ago, so very easy.  I can move the free pivot bindings around depending on which ski is headed into the back country.  They work great.

I like that - not so much for the quiver issue, but more so for traveling. You can throw a couple pair of skis in a small ski bag and put your buidings in your suitcase when flying.

I have made extensive use of shift plates from http://www.bndskigear.com/adapters.html and they work pretty well. That said I am planning on moving to binding freedom inserts on future skis. I want to be able to experiment with positioning as well as have a bigger quiver than my binding budget allows.

On narrow race skis the shift plates move the binding up a very useful 1/4" or so that helps prevent booting out.

Breck