Been scouring the internetz for some late round prospects, namely a back up FS for Thomas. Name i've come across a few times is John Boyett. Seems like he could have been a mid round prospect but has had surgery on both his knees.
Depending on how them knee's play out...He a guy that would fit behind ET? He's obvisouly not a crazy fast ball-hawk like Thomas (few are) however in what limited footage you can see of him from cut up clips seems to cover the field pretty well.