What do you mean "no-ones free"? Trabelsi will be out of contract in the summer which leaves us to pay only his wages. All of the players in my list have already stated that they want to play for Juve, bar Mexes, and all of them are good enough imo.
Trabelsi is one of the best right backs in the world, Ferrari and Mexes are two of the most promising young centre-backs in the world, Jankulovski is a very versatile and consistent performer, Diego will add the lacking fantasy and creativity to our team, and Gilardino is easily one of the best upcoming strikers in Serie A atm. Only Adriano, Cassano, Chevanton and an on form Martins are better.