Amazon.com : SeaFrogs [40M/130FT] Waterproof Camera Housing Diving Case for Canon EOS R3 w/ 6" Dome Port (and Flat Long Port) & ST-100 PRO Flash Light Combo, for Diving Underwater Photography Videography :
17336 NA-R3 Housing for Canon EOS R3 Camera - Scubapix - Nauticam Australia