It's always interesting to try something different.
On your points - you can contact Alembic for pricing on electronics. There are a number of Activator models that are sized to fit in standard pickup routings, and their normal models for which you would have to do some routing. Sit down before you read the pricing - top-flight mainstream bass pickups today are $60-140 each; boutique stuff like Dark Stars are $200 each; Alembics will be much more - a two-pickup+EQ Activator set is $1100 on the Alembic Yahoo! store.
I'll be hard to fit a bird tailpiece on a Modulus. Modulus like most basses use an integrated bridge/tailpiece (Gotoh or Schaller usually) which is mounted at the end of the body. To use a bird tailpiece, you'll need to find a separate bass bridge as well, then figure out how to mount it. The bridge needs to be where the bridge pieces are now but this will leave little room for the tailpiece. The bird tailpiece is associated with the original Series body styles which are very different than the a Fender-style body layout - very large body, which a lot of the body past the bridge, so there's room for all this hardware.
Nothing wrong with chasing a dream, but there are probably some limits on what can be done.
David Fung