Babicz FCH-4 AM String Thru Bass Bridge - Full Contact Hardware
Amazon.com: Bogart 4 String Bass Bridge A Style Top Load and String Through Body Tailpiece with Zinc Saddles for Electric Jazz Bass P Bass Chrome High Mass. : Musical Instruments
Might strings through the body coupled with a tuneomatic be the best bridge system? | The Gear Page
NEW - 4-String Bass Bridge, String Through Body, CHROME 645208003219 | eBay