Really, does losing Davis matter? The last time I saw him playing, someone from the Bengals was running by him for another touchdown. He didn't dress in week 1, and I honestly didn't even know he was playing in the first half yesterday.
Having said that, get the best young guys you can get--on our own Practice Squad or someone else's, and start developing them. Don't waste time on any unemployed veterans--there's a reason they're not playing now. We don't need to see the evidence up close and personal. Get a young guy or two with potential, and let them develop.