i don't know that GS can find a trading partner during the season, and i don't know that they'd want to sabotage this title run just yet. more likely GS could trade lee to a team with cap space this offseason, kind of like what they did with biedrins and utah a couple years ago. i could see philly doing that move just to get to their minimum salary number, and GS would send them their 2015 first-rounder for the trouble.
HOWEVER
if the c's were to make a move for lee i'd suggest this:
-warriors get thornton, bass
-kings get lee
-c's get stauskas, jason thompson (toxic deal, 3years, $6M per year), and derrick willliams' expiring
c's would essentially be getting stauskas for taking on thompson's crappy contract. considering how poorly stauskas has played, i don't know that it's worth it.