[Kenwood] knob for TS 690 needed

[John King]

Our radio Club, Livingston Amateur Radio Society, W5LRS has recently acquired a nice that needs  the MCH/VFO knob. That is the small knob in the upper right hand side of the TS 690.We are in the process of assembling our Club Station.
I am sure the needed knob might be used on the TS450 (HF version of the TS 690 HF+ 6 meters). If anyone has such a small knob or knows where we may acquire such a small knob, please advise me and give me the details regarding how I might acquire it. Thanks  and 73, John, K5PGW