Here is a commercial machine that makes you 6 egg cakes. The Eapmic Egg Cake Maker has an adjustable temperature from 50 to 300C. It has a food grade stainless steel shell and cast aluminum heating plate. It has Teflon coating and 3000W power output.
The unit also has an adjustable timer (0 to 5 minutes). The machine has air vents no both sides for quick heat dissipation.