All of those options are very ugly, and they all will hurt your ERA and WHIP if you use them. Here are two suggestions that might be the best of a scary bunch. First choice would be Hendrikson. He doesn't get many K's and has been shaky lately but plays for a team with a very potent offense and gets lots of run support, which means he should at least contribute some wins. The other suggestion would be Simontacchi, for the same reasons.
That said, you might do more harm than good using any of these guys. I would consider picking up a solid middle reliever and using him instead of replacing Dreifort because the wins from using a shaky starter probably aren't worth the damage in other starts.