Battle against Karador on impossible

[BB Shockwave]

I tried killing Karador just to see whether he has Ancient Vampires for sale after the fight (I looked everywhere in Death Land, Demonis and none are avaliable... ) - if his death knights hadn"t completely killed my cursed ghosts (thus stopping me from resurrecting them), I could have done the fight without losses. Ah well. (and no ancient vampires too...)

Anyone knows a good place to get Ancient Vampires? Maybe Xeona or Bhaal sells them after you beat them? I even looked in crypts and graves...