The link below will take you to a discussion regarding options for building your own inexpensive RCM. If you need greater detail or more info, I'd be happy to talk with you. Good luck!
http://www.audiointelligent.com/aboutrcm.htm
Best regards,
Paul Frumkin
http://www.audiointelligent.com/aboutrcm.htm
Best regards,
Paul Frumkin