Why not sign a guy like Chris Wilcox? He seems to fit the bill as a backup PF/C.
Wilcox is my first choice. He's athletic and a good rebounder (10rpg/40m). He's also considerably young (will turn 27 during training camp), and oddly enough he's not getting any interest in the free agent market.
Hopefully we can grab him for the LLE in a short contract (2 years with second year as a player option) so he can use this year as a contract year to see if teams see more of him next year. The experience of being on the celts would make him a better player too.
Granted he's a pipe dream, as I think he's worth more and I've always liked him in his Seattle days, one can really hope.
That being said, Wing is the first priority, and if grabbing Wilcox means we can't spend much on a wing, I don't know if it would be worth it.