Clearly DFAing Ort is simply not an option.
Alfaro owning a catchers mitt and knowing where to sit during games does make him somewhat useful, and he also can hit. But yes, he is a long shot. I think Refsnyder with his guaranteed contract is a lock for one bench role, along with Chang and Wong (or Alfaro, but not likely). That still leaves one slot, and Duran and Dalbec remain the most likely 40 man candidates. But Tapia has certainly earned any and all mention he gets this spring...