Custom guitar knobs are available for purchase from Greasy Groove Inc., Warmoth Guitar Products and Guitarfetish. Each sells custom knobs for a variety of guitar models, such as Les Paul, Strat and Gretsch.
Greasy Groove Inc. features custom knobs, such as those that look like skulls, wooden knobs, bell style and speed style. The company also offers pickguards, covers, tuners and hardware.
Custom knobs available at Warmoth Guitar Products include bonnet, round top and vintage styles. The company also offers guitar necks and bodies and bass necks and bodies. Knobs available from Guitarfetish include abalone, pearl, black, top-hat style and a faux-aged amber.