[Guy]

Ours has nothing like that, but I remember that design as being originally for auto heat and defrost. Newell was famouse for adapting auto parts to our coach use. A good example is the door latch. Here is an Amazon product that would probably make the change out easier.Sorry I am a computer klutz, but if you poke around on Amazon, you will find several dual 12 volt blower under 100 dollars. Good luck
BLOWER ASSY 12V 3.00in WHEEL BH1300