Thanks.
I guess if level 5 no longer exists that is a good reason for me not finding it <broad grin>.
I picked up a holy water from the hermit. I thought taking the filled holy grail from near the black bishop in act 3 provides another one but perhaps I got confused and that was simply the first time I had noticed the hermit's holy water and the grail just increases mana.
I've never seen a holy water at the merchants - I'm going solely based on what I've read here that there is a very small chance. Perhaps it is higher in later acts (or only available then) - perhaps not <shrugs>.
In any case I might as well use the one I have once I decide what attribute I want more of. Guaranteed that I won't use it for the benefit of that stinking, evil DK.