Where can I find a 1:1 model of the SG90 servo? User asks for help building a 3-DOF robotic arm

A Reddit user posted asking for a 1:1 model of the SG90 servo to complete a 3 DOF (degrees of freedom) robotic arm build. They need to make an enclosure around the servo arm, but the existing models are too small. They also plan to shrink the base and mount the robotic arm on a self-built RC car to convert it into a rover, and are asking the community for advice.