Hmm ... the pic you posted earlier identifies two of Kerry's swift boat fellow-skippers, Skip Barker and Ralph Dobson, who support him now.
Several news articles mention a third man, Jim Rassmann, campaigning for Kerry now - a man whose life John Kerry saved in 1969.
This Boston Globe article mentions a fourth man coming out on stage with Kerry, "Del Sandusky, a suburban Chicago man who captained one of Kerry's boats".
This article, meanwhile, also mentions Rassmann, "the Green Beret whom Mr. Kerry pulled from the water under enemy fire".
And it identifies yet further "Members of his Vietnam Swift boat crew" who "are giving prime-time speeches and speaking at countless off-camera functions" for Kerry:
"One, the Rev. David Alston of Columbia, S.C. , told the convention Monday night that Mr. Kerry was a man of courage and conviction who never lost his cool." [..]
"He's not aloof and standoffish," Jim Wasser of Kankakee, Ill., another former crewman on Mr. Kerry's boat, assured the delegates at the caucus. "He's a caring, compassionate, courageous, man's man."'
That makes ... I'm losing count here ...
six vets already who fought with Kerry and are now actually out there campaigning for him.
Six men who will come out on stage and testify of Kerry's courage and valour in war. More perhaps - I found these googling just the ten minutes.