Quoted:
Check out your yellow pages.
In Savannah, there is a guy who has a little shop and rebuilds alternators and starters for cheap. He does top knotch work with a significant savings over remans that you get from autozone and the like. He also gives you a 1 year guarantee. I don't' know how good it is, as I have never had one of his units break.
IIRC he charged me $110 last year for the alternator on the wife's 'Burb.
If you live in any sizeable town, you may find something similar.
We have a alternator/ starter shop here in town.
They can build your old unit back stronger in most cases.
I would try to stay with stock belt , pulley , mount so that 200 miles from home on the side of the road you can get a replacement.