Springfield frankly doesn't have that much to trade. But they do have some vs. lefty specialists.
Delwyn Young (B2) had a 1.000 OPS against lefties, plays 2B, 3B and OF, and has a little over 200 PA.
Brent Lillibridge (B1) had a .949 OPS against lefties, and though he only has 101 PA, his speed and position flexibility (2B, 3B, SS, CF) would make him a useful bench guy.
Francisco Cervelli (B2) had an .845 OPS against lefties, 300 PA, and should be a good defensive catcher again this year.
They won't be that expensive since there's not all that much prospect for improvement here. Lillibridge and Young will be in the C auction if not traded.