There hasn't been much speculation beyond Kearns as to who could be brought in to fill the right handed outfield. The other day Anthony DiComo of MLB.com speculated that along with Kearns the Mets could look at Jeff Baker.
Scott Hairston tops the list, though he has also drawn interest from various contenders. Should the Mets whiff on Hairston, Austin Kearns or Jeff Baker could come into the picture. source MLB.com
I haven't heard Baker's name before and it could just be Dicomo's speculation but he would fit the type of player the Mets seem to like. The 31 y/o right hander has major league experience at 1B/2B/3B and both corner outfield position. He's a lifetime .266 hitter with a .316 OBP and a slg of .428.