At Last DeWalt have a 18v Track/Rail Saw DCS572 - YouTube
POWERTEC 110 inch Guide Rail Joining Set Compatible with DeWalt Track Saws | Includes (2) Aluminum Extruded Guided Rails and (1) Guide Rail Connector for Woodworking Projects (71691) - Walmart.com
DeWalt's Cordless Track Saw | JLC Online
Bomgaars : DEWALT FLEXVOLT Cordless Tracksaw Kit with Track, 59 IN, 6-1/2 IN, 60V MAX : Track Saws
POWERTEC 110 inch Guide Rail Joining Set Compatible with DeWalt Track Saws | Includes (2) Aluminum Extruded Guided Rails and (1) Guide Rail Connector for Woodworking Projects (71691) - Walmart.com