The kits are reportedly produced a man by the name of Professor Ernst Blomberg. Several of these kits have surfaced recently, many selling at auction between $12,000 and $20,000.
One such kit is described at the Museum of Supernatural History website:
"The Vampire Killing Kit was sold by Professor Ernst Blomberg in the second half of the 19th century. The kit was made by Nicolas Plomdeur, a well-known gunmaker from Liège. This particular box, which has been in the Surnateum's collection since the late 19th century, has recently been reunited with the accompanying pistol (made in Spain in the late 18th century, originally a flintlock but later converted to a percussion cap in the first half of the 19th century); the gun was lost under circumstances described below. Manufactured in two separate stages, it contains all of the accessories used to maintain the pistol, as well as a large bottle of holy water, small bottles which once contained Professor Blomberg's anti-vampire serum and garlic juice to impregnate the silver bullets, a small bottle of sulphur powder, whose odour could drive off vampires. A crucifix made of wood and copper, various blessed medals, a small bottle of salts, a copy of the 1819 book entitled Histoire des Fantômes et des Démons by Gabrielle de P. (see the Library)."