10pcs Cloth Battery Holder For 9v 6f22 Battery With Velcro Black - Guitar Parts & Accessories - AliExpress
DAIERTEK 10pcs 9V Battery Connector 9 Volt Battery Snap Clip I Type with 2 Pairs of Alligator Clips and 2.1mm X 5.5mm DC Male Power Plug : Electronics - Amazon.com
9 volt battery case with velcro adhesive pad – Alegree