This is the site with the history of the orphanage that you are seeking. My father was raised in the boys bldg., his sisters in the girls. When they were near to teens, my grandmother reclaimed them one by one.
My father has passed on now, but I do recall his detest for this place, the abuse he suffered, he never recovered from. He heard that the bldgs were to be demolished. He was in his 30's at the time and made a trip to the location to watch the bldgs. fall.
As for rec'ds, the site at top and the census records are about all there is, I would imagine.