The Bills may be looking to bolster their wide receiver corps even more.Reports out of San Diego say that Buffalo will be looking to make a move on wide receiver Vincent Jackson when free agency opens. The Bills agreed to a five-year deal with wideout Stevie Johnson on Monday and, if they can get Jackson in the fold as well, they'll have another explosive downfield threat for quarterback Ryan Fitzpatrick. The Chargers can still work to get Jackson extended before free agency begins, of course.The Bears are also said to be interested in Jackson. If the Bills do add Jackson, he'll be a dangerous add to a wideout group that also includes David Nelson, a 6-foot-5 target who had a very good season working a good deal out of the slot for Buffalo (61 catches).