The cheapest JP1 backlit remote is the Atlas 1056B01/B03 series used by a number of cable companies, and generally available for $15 or so on the net. (EBay).  Those are 5 device remotes (the B03 is internally 8 devices, but we haven't fully wrung out interacting via JP1 yet.  There are some others, and you would probalby get more responses at [Link: hifi-remote.com].   I don't know of any JP1 remtoes that turn on the back light from motion. 

The JP1 tools (RMIR) is very easy to use, and works under Windows, MAc,and Linux.