How do I fix a broken door check on 48 DeSoto?

[MarcDeSoto]

On my 48 DeSoto bus. coupe, the left door has a broken door check.  Way before I bought the car, someone must have hit the door when it was open causing the door check to break.  The door flew open and collided with the front fender, putting a crease in the door.   The arm that comes out of the door is still there, but the part that comes out of the door jamb is broken in half.  Is there a way to repair this, or is there a new door check for these cars?  Thanks, Marc.

[JBNeal]

additional information - door check retainer replacement