When Sacred Heart closed, the Manx Papers did a feature; I think it was Peter Kelly's Nostalgia pages in the Manx Independent that gave the most information, but there would have been other news items. I would suggest you write to the Manx newspapers for copies of those articles. If you are local, that should not be too much trouble, but if you are not, then they have a web page www.iomonline.co.im