Sensor Suite for Hombuilt ROV/AUV



I am looking for a sensor suite for temperature, salinity, depth, compass/heading, and wonder if there are such ensembles in existence? I've found one, from MIT, but it has been discontinued. (however they still provide the schematics and components list so building it isn't an issue) I would like to try to find something plug-n-play or as close as possible so I can get into the water asap instead of spending the next few weeks in my garage. It's summer and I'd rather be on the water!