K11 Alternator upgrade?

Hi all,

I have a few audio upgrades pushing some big RMS and have just added another sub - starting to need my headlights now its winter and theyre dimming far too much to even think about driving at night - 2 options:

1. I turn the music down
2. I upgrade my alternator

Clearly, option 2 is the only actual option - does anyone know of an alternator that is suitable?

Ive done a bit of reading and it seems the stock alt puts out 65amps and the nissan primera one does 110 and its a relatively straight swap, but I could be wrong.

Any help would be appreciated.