Rummy Rin Append is available via GetUploader. The download includes Len & Miku Append.
"NOT USE the model/accessory/motion data to videos with scenes of violence, sexual material or slander (such as R-rated)
MODIFY the model/accessory/motion data at your own risk and on your own responsibility
REDISTRIBUTE ONLY the MODIFIED model/accessory/motion data (NEVER the original) UNDER THE SAME CONDITIONS of this readme, with the history of modifications, at your own risk and on your own responsibility."