Hi, I need two knobs for my Hallicrafters HT-37 transmitter. I need the large (1 5/8 in. Dia.) gray (with silver insert) frequency knob and one of the smaller (1 in.) gray (with silver insert) knobs. The knobs for the SX-111 are the same. Please look. I've also posted this on the HCI want ads. Thanks. Skip Magnuson