Check your local dealer and just buy one. If I'm understanding the part you're describing, it sounds like a "J" clip. Can't cost too much.
Another thing that might work is to visit a local body shop or shop supplier. Those clips are used all over cars and they may have something around that's just right.
Another thing that might work is to visit a local body shop or shop supplier. Those clips are used all over cars and they may have something around that's just right.