སྒྱུ་འཕྲུལ་དམ་པ།

One of the frustrations in studying rNying-ma materials is that someone such as Klong-chen-pa cites a work such as the sGyu ’phrul dam pa in his auto-commentary on his Yid bzhin mdzod (http://s.arguillere.over-blog.com) but nobody seems to know the identity of the work. Is it somewhere in the rNying ma rgyud ’bum under another title? Scholars who have seen the title does not seem to be interested in knowing its whereabout. Frustration pure! :-(