Looking for Hair Loss Products for My Hubby

My husband finally admitted yesterday that his Friar Tuck look was getting to him. He decided that maybe he needed to see what we could find to help with it. So now I'm on the search for the best hair loss products available. I would love him to do something because when he complains I get to hear about it. I love him no matter how he looks, but I want him to be happy with himself. So now I have to figure out what is the best product to use. Anyone have any suggestions?