Not sure about wankan, though I got some info somewhere, however, Jitte, Jiin and Jion are called Temple kata, and what I was told were not directly in any system, but were added to various system. The version I have are from Hayashi-HA Shito Ryu, but was told by a Shorin Shihan that the temple kata are not in Okinawan syllabus. Soke Terou Hayashi has the Temple Kata, all 3 available on tape from Dragon Times if you are interested.