Gotoh Battery Box 9V BB-02 – Thomann United States
Rectangle Shape 5.5 Leads Battery Holder Box Case for 9V Batteries - Walmart.com
Amazon.com: 2pcs Standard 9 Volt PP3 Battery Holder Box with Cover DC Case w/Wire Lead On & Off Switch Durable Structure for Long Using Life 2.67inch x 1.3inch x 0.85inch External Power