I think I remember seeing that the University Network does not QSL, but you might want to look up the name of their CE (in Anguilla) and mail a report directly to him (check the newest "WRTH"). Be sure to emphasize that it was MW reception, and the distance, so he realizes it's something to frame and hang on the wall.
I've heard reports that they have had various shortwave transmitter problems, and could not even afford new finals (tubes). This could make his day!