Shore Power AC Inlet Breaker - IP 420

We have two Marinco stainless steel shore power fittings in the cockpit starboard side, right under the helm seat.  They are stacked one on top of the other.  The top one is the 30A shore power inlet.  The bottom one is a 30A breaker.  The breaker has round face specifically to fit into the Marinco cover, is made by CarlingSwitch Inc. and has no part number other than a sticker showing "34-30A".  I've contacted IP.  Their response was try Amazon.  No joy at Amazon.  Does anyone know where this switch may be procured?  Photos are attached.     

Thanks for the help.
Dan
SV Karvi
IP420 Hull #6
Currently lying on the hard in Puerto Peñasco, Mexico

If you find the right guy at Carling, they may be able to help. Their sales rep in FL is Chris Kennedy, mailto:[email protected]