If you just want to have fun with the tank as an airsoft toy then I suggest you get a taigen radio system and their plug harnesses. You will have to look at what the wires do and rewire the whole tank to a new radio system. The mato system is not quite plug and play into the systems available now. This is your easiest and cheapest solution.
IF you want to make it Infrared capable and do battle with a club you are gonna need more money and probably some help.