Buy FirstFed ( FED), Downey Savings ( DSL) and PFF Bancorp ( PFB), Jim Cramer said Friday on CNBC's Stop Trading! segment. These banks "are not good lenders," Cramer cautioned. But Cramer said investors should buy these stocks anyway, if they believe Friday's rally in Washington Mutual ( WM) signals a bottom in the U.S. mortgage sector. Cramer says Lundin Mining ( LMC) could go to $20 from $13.59. He also raised his price target on Google ( GOOG) to $701, topping Bear Stearns analyst Scott Peck's $700 call earlier Friday.