Plastic and rubber gears are super weak

We have purchased 2 Magic Bullets over the last 12 years or so, we still have the original Magic Bullet tucked away in our cabinet, but not one of them are working now because all the plastic and rubber gears are totally stripped away, I have spent a small fortune on replacement gears, but non of them last long I am now at the point of trying to find someone to make me a set of metal gears, if I had access to a machine shop I would try to do it myself what do you think about this idea?