Raef LaFrentz from 5 years ago wouldn't be a bad fit on this team. He could provide some shotblocking defensively (though he's not a good 1 on 1 defender) and could stretch the floor on offense with his range. However, I don't think he has anything left. He's had leg issues for years now.
As for Toine, while some deeply twisted part of me inside would probably like to see him back in green, I don't really see how it makes sense. As a big, he doesn't solve our problem of size and shotblocking. As a wingman, while he does solve size, he's not a good enough of a defender to really make it work. The only way this makes sense is if a) Ainge is unable to pick up anyone else desirable before playoff rosters are set or b) a bunch of our backups get hurt, like TA, Powe, Baby, Giddens, etc.