Second season I signed Jonathan Silva, a young Argentine from Estudiantes for 2.3mil, for my Southampton side.
His stats are a little more defensive minded than Shaw, but at 19 he is young and full of potential. He can fill in as a backup, but don't expect him to be better than Shaw. No one is.
As a side note, I also played Clyne on the left occasionally, giving Chambers time on the right. Dunno if you still have them both though.