I have a Cuisinart DLC-7 Pro food processor that is probably 25 years old. It still works beautifully, and I don't want to replace it. The problem is that after dropping the cover of the work bowl, the little part that interlocks the lid so the motor will work has broken off. Is there a reliable source where I can find replacement parts? The websites I checked claim I need to buy several different parts (lid, chute, etc), and one site sells the whole contraption for around $100. There must be a better way!