So far as I know, Univeral Electronics Inc is the only company that makes remotes that are programmable in this way.  We sometimes refer to these as JP1 remotes, but I doubt that the folks at Radio Shack or other retail store will know this term.  Also, not all remotes made by UEI are programmable.  It depends on the model.

As you may have guessed, RCA does not make the RCRP05B, nor actually does AudioVoxx.  They brand and distribute remotes.   

The most well known (other than Comcast!) brand of UEI remotes is OneForAll. The OARP05S is a sister remote of the RCRP05B, but it isn't as easily available in the US.

Best Buy also sells a Niles remote (8 devices) which is the same internally as the RCRP05B, but quite a bit more money.