Here are updated materials in Williams & Cochrane LLP v. Quechan Tribe of the Fort Yuma Reservation (S.D. Cal.):
71-1 Motion to File Supplemental Complaint
ADDITIONAL UPDATE (8/27/18):
98 Quechan Opposition to Motion to Strike
105-1 Motion to File Third Amended Complaint
105-2 Proposed Third Amended Complaint
109-1 Rosette Motion to Strike
110-1 Rosette Motion to Dismiss
115-1 Quechan Motion to Dismiss
Prior post here.