I found the power supply on Mouser.com for $51. It was a newer model than used originally in the MC-1, but the electrical output specs are the same. Works great!
http://www.mouser.com/Search/ProductDetail.aspx?R=NFS40-7610Jvirtualkey54020000virtualkey826-NFS40-7610J
http://www.mouser.com/Search/ProductDetail.aspx?R=NFS40-7610Jvirtualkey54020000virtualkey826-NFS40-7610J