I've been looking everywhere for replacement tuning pegs for a Yamaha BB415. They are Fender-style elephant-ear pegs, but the mounting plate only has a three-screw fitting. Everywhere I've looked, I can only find ones with four-screw fittings. Can anyone help? Or direct me to a specific Yamaha-replacement dealer? I've also been trying to find a Hipshot Drop-D peg in similar style. If I'm on a wild-goose chase, can anyone inform me as to whether you can just screw the four-screw fitting direct on to the headstock? Or should I continue on my quest for exact replacements? Cheers.