As sixwheeledbeast suggested the "Philips TV Keyset 1" worked with my 1995 Magnavox 19" CRT TV.

The "Panasonic TV Keyset 1b" works perfectly with my Viera TC-42S30 plasma.

Any chance of a Motorola Cable Box Keyset? The qtirreco server had a DCH3200 Motorola set which worked on my Motorola HDTV Dual Tuner DVR DCH-3416 AND my Pace TDC-575D SDTV Dual Tuner DVR. I expect that it will work with all Comcast cable boxes (it worked with all of mine until I had to flash my N900 and qtirreco never worked again and the servers seemed to go down for remote control downloads).

Thanks for creating something which works and with buttons which are properly positioned, Copernicus!