Brian:
Welcome to the club! I'm sure you will get a few more responses to your question, but here's my 2 cents:
I have a Fernandes (guitar, not a bass) that, when I recieved it, had three Alembic strat type pickups and a Bartolini pre-amp. While it wasn't as flexible as my Electrum with lo-pass filter and Q switch, it did work with the Bart pre-amp. I 'm having the Bart pulled out and replaced with Alembic electronics, along with replacing the pickups with more appropriate Alembics. You might keep an eye on eBay for electronics. Alembic systems do show up there every once in a while, often for significantly less than new prices.
Bill, the guitar one