I disliked the VFO knob used on the HB-1A QRP transceiver which I thought was cheap and nasty so I decided to replace it and after a bit of looking around I did just that with a Finger Dimple Generic Kranker which is just perfect.
Cost is US$15.00 plus another US$5.00 for shipping. Check out the Finger Dimple Range.
It took just one week to arrive, their service has always been top notch! Hats off to Wayne K8FF.