I think I heard that the Japanese are close to being able to produce unlimited hair follicles to transplant. They are supposed to be a couple years away from being available. Good news for the guys that don't have enough donner hair or might run out down the track if they need a top up. YouTube has a few guys that have documented the whole process of before during and after their transplants. They went to Turkey and got them done for something like 2k. Going by their videos it doesn't come without some pain and discomfort though and it looks pretty noticeable for a good few months.