I'm looking to replace the knobs on my bass. It's an American Deluxe Jazz which has stacked bass and treble knobs. The problem is, I'm looking for black knobs with abalone inlays, and I can't seem to find any for stacked knobs (or rather, the small knob that goes on top). Does anyone know where I can find these? Also, if these don't exist, does anyone have any suggestions about other types of knobs I can try? I'm considering plain chrome or black knobs, which I had no problem finding. The bass is alder with a crimson finish, rosewood fingerboard (abalone dots) and tortoise shell pickguard. Any ideas?