A few guys I like (in no particular order) if they're available
Broxton (I think MLB catches up with Saito)
Dan Wheeler (might he get the closer job this year?)
Some of those MR pitchers can help your ERA and WHIP more than you think, also they are basically "backup closers"
As for a SS late, I'd look at Troy Tulowitzki, Rich Aurillia, Edgar Rentaria, F Sanchez or Orlando Cabrera.