Most of what MCM sold were Gemline (Gem Products). If you have a
Johnstone Supply (www.johnstonesupply.com) branch office in your area
they would probably have those elements.

Try also these links:

www.appliancepartsresource.com
www.allapplianceparts.com
www.expertappliance.com
www.appliancemagazine.com
www.american-appliance.com