By head do you mean the still? Do you have a boiler for it? The pure distilling reflux still by its self is $460 or $650 incl. the boiler, pot still = $430 or $650 incl. boiler. The boiler by its self is $240. At those prices I would be getting myself a keg, some elements from Mac and a still from JayD. Prices from
here Google is your friend.