I know of some... but right off the top of my head, I can think of three! They are all by tas and posted here on AFF.
"VAMPIRE TEMPTATION" is a Drarry. In this story Harry is kidnapped and turned against his wishes, in order to help him defeat Lord Voldemort. He eventually accepts his new life and even befriends the Vamps that kidnapped him... He stays with them long enough to learn a few new strengths and then returns to school. He tells the Teachers, his best-friends and some of the Order what happened and what he'd become; though he keeps it secret from the rest of the school. Harry ends up taking an interest in Draco after having some interesting dreams... Um, a lot more happens, but I don't want to spoil it if you haven't read it yet!
http://hp.adultfanfi...hp?no=600010026
"FAMILY TIES" is also a Drarry and Vampire fic, but with a bit of a twist... Harry meets a new cousin, an Elf that goes by Bree. She tells him he's an Elf too and takes him from the Dursley's. Later that night he finds out that he's not only an Elf, but an Elven Prince. It takes him a while to adjust to his new life, but he's happy to finally have a real family... At one point he gets to talk with his mother and she tells him he's also half Vampire, since Lily's dead it was a one time chance to talk to her (this was an emotional scene for Harry). Harry goes through training with the other Elves before returning to school and becomes very close to two of his cousins, Bree and Blaise Zabiai... Again a lot more happens but I don't want to spoil it!
http://hp.adultfanfi...hp?no=544202329
"MINE" is a Snarry... It was base off the Vanteerian Challenge, originally posted by Becca589. In this story Harry and Draco become very close, like brothers. After the two of them return home from school, they keep in touch through journals. They talk back and forth and figure out Harry's going through a Creature Inheritance... Draco and Lucius even come to check on Harry to see if they can find out what he's becoming. Later, after Harry's Uncle tries to kill him, they find out he's a Vanteerian and his Mate is Severus. Harry goes through a lot emotionally, thinking that Sev only wants him because of their bond and not because he loves him, but he eventually gets it figured out he was wrong... I would tell you more, but again I really don't want to spoil it for you!
http://hp.adultfanfi...hp?no=544199632
If you haven't read these three, then I hope you enjoy them... They are some of my all time faves!