Preferably looking for the Century 200 knobs...black with red marker. The 86 or newer Rg100ES knobs will work too. They have the light grey caps with the white markers. I have a RG200ES that is missing some knobs and want to turn it back into its original shape. I have contacted Randall about these and they no longer have any of the pre-Washburn parts, so its all about just hoping someone else has em. Thanks.