9 Volt Battery Box Compartment, Shallow, Bottom Mount - Black – GuitarRepairParts.com
9V battery holder panel mount horizontal, 2,00 €
9V Battery Holder with Switch and Leads
A Set 9v Battery Box/holder/case Compartment Cover With 9 Volt Battery Clip Buckle For Active Guitar Bass Pickup (dch-fh-01-dk) - Guitar Parts & Accessories - AliExpress
Pocket Box Large - Takes 2AA or 1 9V batteries , 9-volt batt. - Box Enclosures:
36S9VB Plastic Handheld Enclosures with 9 volt compartment