I was told to yank one outa a old cop car or taxi like the impala for instance (Cause they are high output, Not sure amps havnt looked into it.) Or you could pay for one. Mechman is the trending alternator company at this moment.

This is the quote Mechman gave me if interested.
170 amp
300 rpm turn on
500 rpm - 120 amps
800 rpm - 150 amp
1200 rpm – 170 amps
$299

240 amp
500 rpm turn on
650 rpm - 100 amps
800 rpm - 140 amps
1500 rpm - 240 amps
$399

320 amp
600 rpm turn on
700 rpm - 100 amps
850 rpm - 140 amps
1800 rpm - 320 amps
$499