Forget it, only recently released remotes have preset code for the current sylvania, those remotes being UEI made cable and Directv oem remotes.
You can get the Tivo GLO remote, and use the Sylvania remote to teach it the commands, since its a learning remote.
If you want to get down to a single remote reasonable cheap, at best buy they have the UEI made RCA RCRP05B, the sylvania code in it is TV 1864. Tivo codes are 1443. The cost of the RCA remote, $20