Hi Debbielou and welcome to the forum
We've had a few threads on hemp oil, quite a few people have tried it, particularly in treating scalp p. hempgarden do a good quality oil at an excellent price as Jo has already said, the body shop hemp range is great, though pricey - and when I checked the list of ingredients there isn't that much hemp in it.
As for alternatives, it really depends what you were planning to use it for. If scalp then a good and cheap alternative is olive oil - a good quality one - if for your body you might want to try evening primrose oil or grapeseed oil.
Tell me a bit more about your p and I can help in a more specific way
Su