How about trying to land this guy? He's been disgruntled in Sacramento for quite a while, and although his preferred destinations are San Antonio, NY or Chicago - He could add explosiveness to the bench. He's a team player. He's a wingman. And he's very enthusiastic. He's also in beginning of his last year of his 1.2$ contract.
His only problem is his defense, and I guess that could be worked on (Look how Von Wafer succeeded under the Celtics system).
Maybe a trade for cash could be made?