The Broncos recently release Andra Davis. He isn't a huge play maker as suggested by ESPN's analysis of him, but he is a solid player who is consistent and operates well with play makers around him. Sure he won't be as good as Dansby but he is one of the better run stopping ILB's in the league.
In 16 games last year he started 13 and had 90 solo tackles (113 total), 3.5 sacks, 3 passes defended, but no forced fumbles. He is 31, so he is aging but he does have 9 years of experience and would be a good stop gap in case we can't work things out with Foote.
He is a strong side ILB so I think he is a guy we should definitely look into.