this search
https://www.google.com/search?q=speaker+switch+with+volume+control&rlz=1C1SQJL_enUS881US881&oq=speaker+switch+&aqs=chrome.2.69i57j0i457j0l6.12266j0j7&sourceid=chrome&ie=UTF-8
revealed these among others
https://www.monoprice.com/product?p_id=38159&gclid=CjwKCAiAtej9BRAvEiwA0UAWXhTBZJoxHTRW3cjJIkVpg...
https://www.amazon.com/Improved-Selector-Distribution-Amplifier-Switches/dp/B000NJHAFQ/ref=sr_1_2_ss...=
https://www.google.com/search?q=speaker+switch+with+volume+control&rlz=1C1SQJL_enUS881US881&oq=speaker+switch+&aqs=chrome.2.69i57j0i457j0l6.12266j0j7&sourceid=chrome&ie=UTF-8
revealed these among others
https://www.monoprice.com/product?p_id=38159&gclid=CjwKCAiAtej9BRAvEiwA0UAWXhTBZJoxHTRW3cjJIkVpg...
https://www.amazon.com/Improved-Selector-Distribution-Amplifier-Switches/dp/B000NJHAFQ/ref=sr_1_2_ss...=