Check out the Happy Mouth Gag, available from Sinvention. A favorite with top trainers, Happy Mouth bits are covered with a soft, flexible yet extremely durable, apple-scented plastic that encourages acceptance and softness. This pony bit gag has straps with black solid brass snaps so that you can interchange different bits.
Made by Sinvention in Canada. Full customization is available upon request. Includes a lifetime warranty.