Amazon.com: KUAFU Universal Fifth 5th Wheel Rails Trailer Hitch Mount Kit Compatible with Full Size Trucks (Black) : Automotive
CURT Universal 5th Wheel Base Rails (Carbide Black) 16204 - The Home Depot
Reese Quick Install Rail Kit and 20K 5th Wheel Hitch For 13-18 RAM 3500 Custom Fit No Drill Base Rails For 5th Wheel and Trailer Fifth | TrailerJacks.com
94-15 DODGE RAM TRUCK BASE RAIL KIT (10-BOLT) FOR FIFTH WHEEL OR GOOSENECK HITCH | eBay