CamDolly Cinema Systems - The World's Most Flexible Camera Dolly and Slider System - No Rails – Fotodiox, Inc. USA
Amazon.com : Camera Slider Track Dolly Slider Rail System with Motorized Time Lapse and Video Shot Follow Focus Shot and 120 Degree Panoramic Shooting 31" 80cm : Electronics
Track - Ronford Baker
Amazon.com : PROAIM Swift Dolly w 12ft Straight Track for Jib Camera Crane & Fluid Heads. Smooth Tracking Shots, Wedges for Flat/Uneven Floor, Adapts Various Tripod. Track Ends Prevent Run-Off + Bag (