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Premier Power Welder has a 160 amp alternator that fits "most imports". The alternator alone is $500 + $30 for the saddle-mount option. If you want the full welding system, add $300 (or $500 if you want to upgrade later). It has a "Premier Voltage Regulator" with a heat sink, etc... but I'm not sure if its external or not. I'd shoot 'em an email if you're interested.