You could always just make something up. Find the name a a real Asylum near the location you are interested in(somewhere in Canada) and just build the story around it. If that's not good enough I recommend googling Ghost Hunter websites. The post tons of stories about different places. I'm sure you could find a location and a story that will suit your patter.
Yeah. I've found a website just now and it has a list of most (if not all) the haunted places in Canada and I even have had one of those happen to me and one of my friends once. It was the one near UBC, I was in the back seat of my friends car and we found this lady walking around UBC hitchhiking and I felt sorry for her and told him to pick her up and she got in the car and when we asked where she needed to go she wasn't in the car with us anymore. Talk about freaky right?
Anyways I have made it upto Vancouver - The Vogue Theatre which is a little after a 1/4 of the way down tha page and I still haven't found anything that relates to the story told in the Hampton Falls effect, but I am optimistic.