There are countless electronic compasses on the market now that can feed info to an instrument system. If you do not need a dedicated display (other than what is in the other instruments) the Ritchie DH200 is a bargain at about $200., outputs NMEA, can self-calibrate (although will not "confirm" results which the Sailcomp will) and is a pretty darn good unit. We use them extensively to feed Ockam instrument systems.
