Amazon.com: GoolRC Aluminum Alloy Metal Adjustable Steering Linkage Servo Link Pull Rod Turnbuckle for D90 MN-90 MN-99 MN-91 FJ-45 RC Car 1/12 Rock Crawler Upgrade Parts (Black) : Toys & Games
Servo motors with built-in drive/controls; $249
Amazon.com: E-flite 6.0-Gram Super Sub-Micro S60 Servo EFLRS60 Servos : Toys & Games
Amazon.com: INJORA RC Servo 35KG Digital Servo High Torque RC Parts Servo Motors for 1:10 RC Crawler SCX10 TRX4 D90 (Control Angle 90°-180°) : Toys & Games