Yes, there's pics of George with his infant mustache that he grew starting in Sept. for disguise in India.
His full one would be here: "When they returned to Heathrow airport, on October 22, George was seen to be wearing a moustache." I know I've seen pics of G getting off the plane (or greeting Ravi's flight 4 days later) with a full 'stache.
Paul started growing his after his moped accident, so whatever date that is will help you zero in on Paul. Cheers.