Hello! Glad to be a part of your community.
Trying to find a heat exchanger for my Intertherm MGH-055-AMWN-06 mobile home down draft type a/c heating unit.
Suspecting the exchanger may have a leak inside.

Contact these people if it is still available they can get one for you. It might be so high priced that you might be better off replacing the unit.

MGH and MGB Furnaces: Mobile Home Depot (http://www.mobilehomedepotmi.com/parts_pages/furn_MGHMGB.html)