Microwave quit on Apollo 1/2 Time Convection

[Esyrydr]

Anyone had any issues with the microwave part of their Apollo 1/2 time Convection Oven quitting. Our microwave arced and sparked the second day we owned it when we went to reheat some calzone for breakfast while boondocking in the Black Hills.
I pulled the unit and found a diode wired from the capacitor to the frame that had burned through the casing of itself.
I called the manufacturer and they said the repair kit is $149.00 and it may or may not work.
Is there any other brands out there someone else has used that fits in the opening of the Interstates galley?

[UKDUDE]

My 2004 EXT has a Cuisinart CMW-200. Like many of these appliances, Airstream uses a metal surround to bridge the gap between the sides of the cabinet sides and the microwave sides.

[Esyrydr]

Sorry...I should clarify. The diode is internal on the microwave connected at the capacitor and wired to the microwave/oven. The only connection for the microwave/oven to the Airstream is through the power cord.