Thanks Eric,
I ended up getting a NAPA 25-080710HD, was told it was the heavy duty version as well as a extra 25.00. Got up early this morning and was on the phone when everyone opened. Drove 20 miles each way to the NAPA that was less 5 miles away as the crow flies. Picked up the belt and got under way a couple of hours later than planned.
I haven't actually put this belt on yet, the used one got us home and still looks good. I'll switch them out later. For anyone following this the serpentine is easy to switch out, but you will need a 1/2 in wrachet, or 1/2 in breaker bar to put in the tensioner slot to get the belt on or off.