the only likely place is SJP road. are you running windows or linux? If the latter, almost any remote+transceiver can be used via lirc. If windows media centre, you may have to look for compatible models.
If you plan on running this off of MS Media Centre Edition then any model of harmony remote should work even though the 680/685 are made for HTPCs. Pair it with one of these as a cheap solution and you are set.