The Frenchman signed the shirt and handed it over to Busst after his testimonial game at Highfield Road last Friday.
Murdo Mackay, Busst's agent, said: "Eric scored twice wearing this shirt, signed it after the game and donated it to David's benefit. At the time no-one realised how significant it would be, but it was his last appearance for United and his last goals."
Busst was forced to quit the game after being badly injured in a match against United 13 months ago. He said: "I am delighted for the way that Eric has helped the testimonial. He has been absolutely brilliant."
Cantona's is to feature in a 20-minute black and white film about boxing with American actor Mickey Rourke. The film is set in and around Marseilles, where Cantona was raised, and will also star his brother Joel.Reuse content