I had the same problem with the elbow coming out of the fender years ago. Don't bother trying to fix it; it will break again with boost. Once it's broke, it's probably done. I'd find an OEM replacement somewhere, ebay maybe or Facebook groups, or fabricate your own elbow from pvc or you might be able to find an elbow online. I can't remember what the outside diameter is for the inlet/outlet is, but measure that and seach the Googles to see if you can find something you can use.