I have a quick attach unit on my La853 loader. One of the two handles that raise and lower the pin to lock the attachment into place is missing the bolt and nuts that hold the spring in place and keep tension on the handle. There is an appx. 1/4" hole that looks like a bolt would go in, but there are no threads. In the parts diagram, there is not a replacement bolt, only the nuts and springs. Any idea where to get this piece, and how to attach it? I am assuming it is welded on, and a well broke loose at some point. Thanks for your help!