After searching for these with with no luck, I have discovered the following EFCs for the Bose LifeStyle 48 inputs by trial and error. I am using the Comcast silver remote and IR code set 31933 (4-digit Code 1933 in JP1).

EFC
00058 -- Aux
00107 -- CD/DVD
00044 -- Power off
00056 -- VCR
00085 -- AM Tuner
00103 -- CBL/SAT
00147 -- Power off
00163 -- Music Storage
00182 -- AM Tuner
00209 -- Music Storage
00216 -- FM Tuner
00310 -- TV