Observe....
Broken
[attachmentid=16704]
Not broken
[attachmentid=16707]
So, my initial idea is to just... get my little dremel drill out, drill a hole right through the case where the screw holdy hole bits should have been, bolt the broke bit of hinge back to the case and use this glue I just got to glue the broke hinge metal bit back.
I reckon that'd work pretty well, but the two screws showing on the lid would obviously look a bit ugly (i could spray them black, but they'd still be visible