There seems to be 2 'Warlock 3' games. They are both still for sale. Just scroll down to bottom of the page to buy it, or use the phone number at the top.
One is subtitled 'Reign Of Heroes' -
http://www.ssgus.com/warlords3.html
The other is subtitled 'Darklords Rising' -
http://www.ssgus.com/darklords-online-game.html
I hope one of these is the game you are looking for.
k: