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Here are the part numbers for the knob and gate, they are still available through a few providers. Google them and they will come up. What’s no longer available is the brushes that cover the area under the gate. I found some industrial brushes on Amazon for 5 dollars are modified them to fit. There are 3mm holes drilled in the bottom of the gate that I used to attach the brushes. They also worked to secure the gate to the base.