How-to: Make a Chassis For Your Robot - EmbedJournal
Line follower robot chassis by SirZapsALot | Download free STL model | Printables.com
Amazon.com: XiaoR Geek Smart Robot Car Chassis Kit Aluminum Alloy Big Tank Chassis with 2WD Motors for Arduino/Raspberry Pi DIY RC Shock Absorbing Tracked Robot Car Toys - Learning Kit (Black) :