MaxMini.eu have released their Biosword conversion parts pack.
From their website:
Set of 6 randomly selected bioswords. Designed to work with larger creatures (monsters, demons etc.) in 28mm “heroic” scale. They should also work with fantasy sets in 54-70mm.
Supplied unpainted. Each sword has around 46mm total width. Sculpted by Marek Rurarz with concepts by Boleslavart.