I think we'll just play Addy there. Hopefully Ferguson is back soon so we will have Fergy, Olbison and Bridge available for the second row. Blythe will be back eventually which will add further cover to the back row.
Alternatively, Kearney could play there as suggested by others. This would actually solve FC's current headache over who to play on the wing, but would leave us light if any one of Foster, George or Kear picked up a knock.
We still need another prop more than anything else. Having only 4 recognised props - one of which is only on a short loan - is just asking for trouble.