Butt Stock Cartridge Holder

[Niederlander]

Gentlemen, Where does one find a leather butt stock cartridge holder in leather?  It wouldn't hurt if it added a bit to the length of the stock, too.

[Cap'n Redneck]

Ebay seems to have a representative selection...;

https://www.ebay.com/itm/315017211877?_skw=leather+buttstock+shell+holder&var=613501733167&itmmeta=01JHVAA06BDCJ3Y9WX4XR0TZPF&hash=item49587d2fe5:g:xdYAAOSwD~lkw2l8&itmprp=enc%3AAQAJAAABAHoV3kP08IDx%2BKZ9MfhVJKmKPRqOTphycmiMlzjCNrNQex370lZQZpNahYUkn1%2B7%2BYjeWYhcP7f0vtShXsJyrkrUPgBGKYl4qHgw%2FiUis%2B7gzO07A5kWkEUQWTp%2FoYB2olozgkYhUO2DtyjHZrbdlRUwVN03LfNuTV%2FP2LzErmoxA4GPwVC6H0zugO6sw5k9nWStDRbNEbS3MMcxY5gV8v7fLE%2FWNcIGyGTq2tzt9X%2FJd7FrNeiiB1JB0N2bQJU7LUvRwtEotsQC53VmiHA6Kolbk%2FlC8bXwYpLAXplfKjQpmTuL9Az2C81%2FtQa5kCfUdZ0gmOXAiwfCJyfShCea4%2FA%3D%7Ctkp%3ABk9SR6aDqOqOZQ