Thank you Radman, I must be thinking vaguely along the right lines as I had already found and bookmarked that very page! Unfortunately my knowledge is too limited to know whether servos or motors are the answer =(.
Been looking into Peltier more, it appears that maybe I need to use a water cooling system to absorb heat rather than fans driving heat away. It's difficult to find data on what cooling Peltiers can and cannot achieve.