I have not come across Buddhism for vampires, but how about Buddhism for Nagas
The Nagas live at the bottom of deep rivers, seas and oceans and in the bowels of the earth and they also live in wells and lakes. They can fly in the air, however; they do not do so too often because they will become exposed to attacks from their eternal enemies, the garuda birds. They protect meditators and they have strong magical powers (theikdi).
The best known of all is Mahakala, king of Mañjerika-bhavana (the dragon dwelling under Sineru/ Sumeru). He lives for an entire age (Sanskrit kalpa, Pali kappa can refer either to an aeon or a full "life term," which for nagas is either 90,000 or 90 million human years), and is a very pious follower of the Buddha.
They also played an important role in the custodianship of a part of the Buddha's relics until they were needed for the "Great Pagoda" (M?ha St?pa). And when the Bodhi tree was being taken to Sri Lanka, they did it great honour during the voyage. Other Reptilian kings are also mentioned as ruling with great power and majesty and being converted to the Buddha's teaching -- for example, Arav?la, Apal?l?, Erapatta, Nandopananda, and Pannaka.