1999 Dodge Caravan stranded in chicago.

In traveling here from out of state to move my son home, my serpentine belt broke off, the bottom pulley had failed; both need replacement. I am pretty mechanical but not familiar with all things automotive. I need the name and preferrably the part number for the belt and the pulley that self imploded. An engine diagram of the pathway with these parts labeled and the length needed for my vehicle would be awesome. I was supposed to work tomorrow back home but now have work in chicago that takes precedence. I have tryed a few mechanics over the phone but no one can get to it until next week, and with their rates over a hundred an hour I thought I could buy a set of tools and put this part in but the autozone guy wasnt a mechanic, although he did his best, and couldn't help me find the right pulley.