I bought a pair of John Lyons mecate reins earlier this year when he visited my local Fleet Farm ($42 new). I've found that they are a bit too stiff and chunky for my small hands. If anyone has a pair of mecate reins that are smaller in diameter, a bit softer and more flexible (perhaps used?), and would like to trade, please let me know!
My reins are black rope and black leather, and attach to the bit with conway buckles. They were used once, and I cleaned them afterward. I can get a picture of the actual reins on here later.