first 2 links r great. i got a quote from the guy on the first link, almost same exact price from ebay store(within 10$). now the last link. i got a quote from that guy, he wanted like 500$+ for a 200a alt. he can lick my balls.Excessive Amperage - http://www.excessiveamperage.com/ Iraggi Alternator - http://stores.ebay.com/Iraggi-Alternator-and-Electronics_W0QQsspagenameZL2QQtZkm
HOAlt - http://www.highoutputalternator.com/
There are others, but these are the ones I have heard good things about.
http://www.mean-green.com
Great Warranty, 3year/300,000 mile standard. They take good care of you, and will sometimes do a price match if you're lucky!
NG