14mm wheel adapters for Clod

[Elmo]

I bought a set of wheel adapters for my E-Maxx years ago that allowed me to go from 14mm to 12mm to use clod wheels on the E-Maxx. it came with a sleeve type adapter that slid over a 12mm hex and converted it to 14mm and that's what I have been using to run Maxx wheels and tires on my clod since then. They are plastic and they work reasonably well but after years of abuse I finally broke the last one I have on hand. What are my options now to run 14mm hexes on my clod? Does anyone make wideners that go from 12-14mm? Thanks for the help guys!