At Last DeWalt have a 18v Track/Rail Saw DCS572 - YouTube
POWERTEC 55 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 - Compatible Plunge Saw Blade 165 x 20 x 48T - UNBRANDED | eBay
DEWALT 59 in. Track Saw Track DWS5022 - The Home Depot