It's not optimal, obviously, but among the options in the fold right now, I guess I'd give Devern a look. Sox Prospects scouting report below shows that he probably has the stuff to compete. Most important, he seems less likely to commit the cardinal sin of the closer - the free pass. That said, it might be preferable to convince Tavarez that 2007 games can have 14 innings and have him close.
Sox Prospects: http://www.soxprospects.com/players/hansack-devern.htm
Scouting Report: Hansack is a lanky righty who throws a lot of strikes. His arsenal includes a four-seam fastball that sits around 92, a two seam fastball with some movement, a good low 80s change-up, as well as a tight slider which he utilizes as his out pitch. Good command of all of his pitches. Forceful delivery. Pitched in the Houston organization from 1999-2003, but was released in the Spring of 2004. In 2004 and 2005 he pitched in a Nicaraguan professional league, where he also had to work as a lobsterman to make ends meet. Hansack is of Creole heritage and speaks Creole, English, and Spanish. Signed by Ben Cherington. There has been some confusion as to Hansack's true age, as his birth year has been listed as 1978, 1980, and 1982, but Boston lists Hansack as being born in 1978.