You can put a .45 ACP case in the bolt face, then tighten the bolt and case in your vice. Drive out the ejector pin with a punch. The ejector and pin should come out so you can clean it out if it's a brass shaving.
I've got the roll pin removed, ejector is jammed in there tight. The 45 case in the vice trick is genius! That will be perfect for reinstalling when I get things freed up.