Steve Carell and Tina Fey teaming up once again? The duo, who will be seen opposite each other in next year's "Date Night," are loosely attached to star in "Mail-Order Groom," a Warner Bros. comedy about a naive single woman who can't find love and ends up with a husband from Eastern Europe, bringing him home to the States. Glenn Ficarra and John Requa have come on board to do a light rewrite of the script, which was originally written by Robert Carlock and Scott Silveri. The story is based on an idea by Fey's husband, Jeff Richmond, plus Carlock and Silveri. Carell's Carousel Prods. and Fey's Little Stranger are producing "Groom." The onscreen reunion for the duo, however, is a dicey proposition. The project has no director, and the only window for Carell and Fey to shoot would be the hiatus of their TV shows, "The Office" and "30 Rock," respectively. Fey doesn't wrap "Rock" until March 23, then goes i...