I found these servo its got 75oz of Torque , Metal Gear with Ball Bearings all for $18 + shipping
here is the link
I just got done installing the servo . The parts that use to install it . 18t servo save for hitec (by associated # 21049) and household goop. I had to cut the tabs off the servo. Then installed the servo saver with a pice of heat srick around the c spring . I had to grind a the top edge the servo case so you have full steering to right side. Then I glued the servo in . With it powered up so you get the wheel line up with the back wheel . I use a clamp to hold it to place to let gule dry.
I tried one pack it and it worked alsome.
Stock 75oz full size 416
This were I grind it the edge off the servo