Undead Familiar?

[Angry Wizard]

Are there any improved familiar templates that turn your current normal familiar (such as a raven or a bat) into an undead? Nothing else special, just a straight undead conversion.

[Java Man]

Vampire companion feat from Monster codex makes your familiar or animal companion undead, dhampirs and vampires qualify at level 10.

[Angry Wizard]

Perfect! Exactly what I needed! Many thanks!