OT: Temperature and voltage monitoring

I apologize for the OT nature of this, but knowing how many excellent engineers are on this list, I thought I'd take a shot... I need to monitor temperature and voltage of 24 batteries in more-or-less real time (say, one sample every 10 seconds). The batteries are connected in series, so I need to have isolation on the voltage sensors. Ideally, I'd want to have the sensor output available via RS-232 at some decent rate (say, 9600 baud). Temperature range would be 0-100C, voltage from 0-16VDC. This is for the batteries on my electric truck, BTW. Does anyone know of a reasonably-priced, off-the-shelf unit that can do this? Email me privately if you'd like, or on the list if you don't think this is too off-topic (you can just pretend I'm going to be reading the data with my Atari ST). Thanks! -Tom