Rickenbacker Horseshoe Pickup Bass Bridge – RockWall Guitars' Rickenbacker Parts
Amazon.com: Rickenbacker 4001 / 4003 Bass Bridge High Gain Pickup : Musical Instruments
4001 pickup vs string alignment - Rickresource Rickenbacker Forum
If you ever wondered what a Seymour Duncan pickup/Hipshot bridge modded 4003 looks like... this is it. No hum, more output, pickups to actually rest your thumb on and a black plate
Zubehör
Bartolini 4-String Original Bass Rickenbacker (6RC), Bridge, Black