I just tried out a URC/Lutron 433 lamp dimmer with a code set I received and it works perfectly. It's even easier to set up than with a URC remote.

To be clear about this, you must have the following:
1. A 433Mhz RTI remote.
2. A 433Mhz URC/Lutron dimmer. (Also known as "B" series)
3. The codeset.
4. The buttons must be set in stand-alone mode.
5. The URC programing sheet for the dimmers.
6. Be able to read and follow directions.
That's it. Simple.

The codes are now in the Mega-List.