I need a bigger alternator

[BigPhattyVW]

Hey everybody,

Im trying to put in a decent size stereo system in my bug. When I add up the total amp draw of the amplifiers it becomes higher than 95 amps, which is the size of alternator that I intended to use.
Is there any way that I could maybe mount a second aftermarket alternator to power the system or has anybody ran a high powered stereo system in their bug with no problems of sucking the charging system dry.

Thanks
Clint