You might want to try calling the River Office at BLM Moab ((435-259-7012) and ask them to radio out to the ranger station and see if it is there.
Folks sometimes will turn stuff in at the station when they come back for their shuttle vehicle. Also, rangers coming off patrol will occasionally find gear at the Cisco ramp, which also goes in their "lost and found" box.
A forum community dedicated to whitewater kayaking, boating, and rafting enthusiasts. Come join the discussion about safety, routes, gear, models, styles, gear swaps, reviews, accessories, classifieds, and more!