The best of the bunch are Flames backup Dan Vladar, currently with a .905 save percentage, and Alex Lyon of the Red Wings with a .911. Both the Flames and Red Wings are actually relying on the goalies as part of their starting tandems, so even they may be reluctant to trade.
The Oilers may be reluctant to make a goalie trade now, but if they continue to be at the bottom of the NHL, a trade will have to happen. A cup contending team simply can't have goaltending this far below league average.