Face_off and Morris have a few packages at Daz that are "vampire". I believe they are for M3. I've seen various V3 "vampire" addons here at Renderosity, but I can't recall the merchants off hand. I have never watched "Buffy" so I don't know the what their vampires look like, but the ones I've seen are more traditional in looks if that helps you out at all.

"It is good to see ourselves as others see us. Try as we may, we are never
able to know ourselves fully as we are, especially the evil side of us.
This we can do only if we are not angry with our critics but will take in good
heart whatever they might have to say." - Ghandi