well your implying that this is for some fan art you are trying to create. there are some things i think you should consider before pasting on some hand someone created for you
1. a good part of artistry is learning how to adapt. if your not good at drawing hands, try to imagine an angle where hands are down played and not as out there as a dramatic shot.
2. a good fun part of being an artists is sitting back and looking at it and thinking \"wow, i created that\" I dont think you would get the same feeling if you looked back and knew that not all of it was your work.
3. giving credit to another artist for partial work on a piece of artwork is pretty tricky.
i dont know, im not much of a realistic sketchest so i cant say that i could make the type of hand your looking for. just thought you could think about these things before just asking everyone to make a hand for you...