Radio controlled model tank (Lostock Hall PR5)

This is a radio controlled model tank used in competitions. It can fire a pellet up to 25 feet. Unfortunately it no long responds to radio control. This may be because its signal pick up is not working, or the transmitter has failed. I had it looked at by an expert in a 'Repair Cafe' and he recommended buying parts off the internet, He showed me that there are many business sites selling many RC tanks for parts or repair. So its a project for somebody.