I liked Terrel Harris in the few minutes I saw of him in Miami. Nice athletic active 6-5 two guard. He wouldn't be a PG option but Doc could leave that to Bradley, Terry and Lee if need be. Go with a true two guard instead if Doc wanted to.
Chris Douglas Roberts could be another interesting option. Solid scorer. Passable defender.
I really like Rodney Carney. Very good defensive player with elite defensive potential. Not the smartest player though. Might be difficult to get him up to speed in such a short period of time. Already short-handed. No alternatives if he struggles. Yeah, probably not Carney, pity.