I have heard of Aprivilia...someone was talking about it on this site some time ago. It appears to be unique to one person's practices. The only spells I know of are the ones that have been shared here, the fastest way to find them is to use Google on SoM using the toolbar at the top of this page. I am not sure if any work, nor do I know the results of working with the spells, as I have not tried them myself. Good luck with your search, I am sorry that I cannot help more.