Any idea? They should not be so difficult to do (well... I said so even when I started making mouthpieces and it took four years to make a decent one). Soft waterproof leather is easy to find, hard felt is easy to find too. You can have it cut in any shape. We also need steam to be sure it is in plane. Some cardboard (?) on the back.. What do we need more? Glue, holes made with different diameters in hard blocks, and some weight to put on the drying pads. Any advice is welcome...