I recently acquired a Roscoe 6 string fretless with a gorgeous bubinga top (#6363). The original owned including with it 3 figured bubinga knobs. He did not have the stacked knob and I am dying to find one. Looks awesome with the black knobs on it but I really want to have a complete set of the figured bubinga knobs to put on it once in awhile. Anyone know where I can find a stacked figured bubinga knob? I can post pics if it helps.