hmmm.... This doesn't make a lot of sense. There are high-output alnico pickups, such as the Dimarzio Ar Zone and Tone Zone.
If you're making a comparison between ceramics and alnicos, here's an interesting quote from Bill Lawrence's website:
When I read that ceramic magnets sound harsh and alnico magnets sound sweet, I ask myself, " Who the hell preaches such nonsense?" There are harsh-sounding pickups with alnico magnets and sweet-sounding pickups with ceramic magnets and vice-versa! A magnet by itself has no sound, and as a part of a pickup, the magnet is simply the source to provide the magnetic field for the strings. The important factor is the design of a magnetic circuit which establishes what magnet to use.
If you're using VH's Eruption sound as a model, then can I assume that you're recommending a PAF-style humbucker?