Sonar and GPS Combo Garmin GPSMAP® 720s from fishing tackle shop Riboco ®Riboco ®
NavPod SystemPod Pre-Cut for Garmin GPSMAP 7407/7407xsv/7607/7607xsv/720/721/740/740s/741/721xs/ echoMAP 70s/70dv in the center *AND* 2 additional instruments (3.6" holes; one on each side) 9.5" wide guard - Trionics
Garmin Power Data Sonar Cable f/720, 720s, 740, & 740s
Amazon.com : NavPod GP1511 SystemPod Pre-Cut for Garmin GPSMAP 7407/7407xsv/7607/7607xsv/720/721/740/740s/741/721xs/ echoMAP 70s/70dv and 1 inst. (3.6" Hole) for 9.5" Wide Guard : Sports & Outdoors