Need one knob for Hallicrafters SX-100

I am in great need of one small knob for a Hallicrafters SX-100 receiver. It is the "notch frequency" knob located to the left of the S Meter. The receiver has been repaired completely and works great but needs this knob to make it complete. Does anyone know someone that may be selling parts from a scraped out Hallicrafters receiver.

Knob discription: For 1/4 inch shaft, knob is 1/2 dia. black phanolic, fine groves in knob, 1 inch dia. metal skirt, there are frequencies etched on the skirt. There is a small metal disk in the front end of the knob.

If you have any leeds please leave me a message: [email protected]
Thanks
Les