look around, I get them from the local Napa brand new Delco for quite a bit less than 180$
http://www.amazon.com/ACDelco-335-1049-Professional-Alternator/dp/B007QBQJUQ
http://www.rockauto.com/catalog/x,carcode,1025334,parttype,2412
http://www.amazon.com/ACDelco-335-1049-Professional-Alternator/dp/B007QBQJUQ
http://www.rockauto.com/catalog/x,carcode,1025334,parttype,2412