Amazon.com: BQLZR 6pcs Guitar Tuner Buttons Full Size Buttons Alloy Machine Heads,Hole Diameter 4mm,Metal Guitar Tuning Buttons For Acoustic Guitar Line Up and Push on to Install : Musical Instruments
Grover Black Ivoroid Button Rotomatic Tuners for Gibson®/Epiphone® Guitar 102BCI | eBay
Harley Benton Parts Ebony Tuning Button Vint – Thomann United States