Id look in the used section for a rc that will fit that body size....unlikely you will find parts for that .that electronic is a all in 1 board. esc.servo control reciever,
it looks like a Toy grade car to me.. you will be lucky if it modular internals. w use 3 wire plugs in our hobby grade rcs. pull body off show some pictures then we could give you more help. also what battery pack does it use?I have upgraded a few toy grade rc to make them more user friendly...