Summary

Just a replacement. The original parts doesn't break the bank, but in case you or your kid breake it more frequently, or if you have to access to these spare parts.
I printed it from ABS with 50% infill and 0.4 nozzle and 0.2mm layer height. I cleaned the holes for the bolts, lower wishbone axes and lamps with a 3.2 / 5.0mm drill. It lay with the flat side down, sorry for the wrong orientation of the stl file.