The 1968 US navy’s ‘VSX’ (‘Carrier-Based Anti-Submarine Experimental’)

US Navy ‘Carrier-Based Anti-Submarine Aircraft’ (‘VSX’) program

The 1968 US navy’s ‘VSX’ (‘Carrier-Based Anti-Submarine Experimental’) would lead to the Lockheed / Vought (LTV) S-3 Viking being announced winner.
This very advanced, yet technical challenging design would remain one of the best ASW aircraft to the day of its phasing out of service.
But the US Navy was said to have a time on deciding the wining design of its ‘VSX’ Request for proposal, between that of the other design submissions from General Dynamics (Model 21)(2nd place finalist) Grumman, McDonnell Douglas and North American-Rockwell.
Does anyone have any information / drawings of these other designs?

Regards
Pioneer