I am loving playing my new to me '99 Orion bass. One modification I would like is to have inlays put into the fretboard. Is this something I can get done with the Alembic factory? Ship them my bass?
If yes, what kind of time frame to do such a job and approx cost?

Yes absolutely Alembic will be able to do that job for you. For time frames i suggest emailing or phoning Mica.

  Exciting news

Allen was going to send his Essence back home for inlays a couple years ago. Mica's reply then will give you a general idea of the operation. You'll want to call or email for current pricing and scheduling shop time. https://club.alembicguitars.net/index.php?topic=24206.msg242007#msg242007

Thanks, that post helps!