Probably Austin Carr. Similar three cone, shuttle, and broad jump scores. Doesn't mean he's Edelman, but the physical tools are there. He'll probably only play on special teams, but that's fine. Amendola should be able to step in for Edelman; Danny's not the same player but there's no team better positioned for this kind of injury where you can have a top-15 slot guy step in for a top-3 slot guy.
If they were looking for a veteran, and I kind of doubt they are, Allen Hurns is a slot guy and is likely on the trade block. Maybe they could get him for Ealy or one of the swing tackles. Both teams had a close look at each other just last week, after all. He had a really down year last year, but so did everyone on that team thanks to Bortles.