A plastic arm type of piece has broken and no longer allows the left side of my sunroof to function. It was stuck open but we were able to manually get it closed. My question is where can I find this piece? The only option it seems is to buy the entire sunroof frame but that goes for 600 dollars. Does anyone fabricate these pieces? Attached is a picture of the piece. There are numbers on it: 42709711. Any help would be appreciated.