Well I e-mailed Nathan at Excessive amperage to see what his prices looked like. And here is what he sent me. Great guy if you ask me.
I like to replace the smaller 105 amp alternators with the large case alternators, as they bolt right on with no mods. I can custom build the following that will be 100% NEW, smaller pulley installed, custom built, and shipping included in the U.S. :
200 amp $295
250 amp $390
300 amp $485
I can give better prices if you guys are interested in a doing group buy. Let me know what I can do to help. Thank you for the email,