Decoding the Pronto Hex from
this thread, your TV uses the Sharp IR protocol, device 1. This is typical for Sharp TVs, although other Sharps TVs use a different (Sharp DVD) IR protocol.
I think many universals will carry the setup code for this, including Comcast and other cable company remotes. I know that the RCA RCRP05B ($15-20 at Best buy sears, Walgreens, etc.) will control it using setup code TV 0093, 0688, or 0720.