Transmission cover carnival 2012 manual

Hello everyone I'm currently looking for this cover. My mechanic informed us that it is a cover between the transmission and the engine but I can't seem to find a similar one online. The original part was misplaced so i dont know the actual thing. Our mechanic said its made of thin metal sheet with foam inside he even made a pattern of i. If anyone can tell me the exact specific name or parts number will be much appreciated.