Sign Eric Fisher if he'll take ~$10M and IR Waletzko. Roll with Ball as backup RT and Fisher as backup LT. Have Fisher active on game day to get us through that game if anything happens, then have Ball active the following week if necessary.

Worst case scenario if Tyron and Steele both get nicked up, Tyler Smith can slide out to LT or Zack can slide out to RT with Fisher filling the other spot and Farniok or McGovern coming in at G. Not ideal, but at that point, it's just doing what you have to do to get through the game without getting the QB killed.