Principally Absima, Team Associated and sometimes Kyosho, offer kits of their radio control cars for assembly. These are all good quality cars and relatively high specification for the price - higher than equivalent Tamiya ones for example.
Absima use a purely "build by diagram" method - part numbers in the manual are only there for you to buy spares, the build is done entirely by diagram.
Tamiya 47439 TT-02 Type S...
Gaugemaster PM60 Solenoid...
BEA35 Mr Bear Tamiya TA03...
Tamiya 58666 Comical Horn...