Mark, have a look at the LM35 devices from Texas and National. The output is detected on a millivolt scale on your meter and gives a direct readout in Centigrade.
Maybe it has sufficient accuracy for your needs. I cobbled one together using the wires as the detector since the input of the TO92 device is the wires themselves. You may even want to use a small piece of PCB to increase the speed of settling.

Murray