Hey Jazzyvee,
Why the heck would you want to do that?!!!
In my humble experience, fretless Alembics are the best sounding fretless Basses ever made. And I can say that after having tried among others, the F Bass Alain Caron signature model. Believe me, used fretted Alembics are more common and easier to find than you think.
If you do decide to fret a fretless Alembic, it may cost more than you'd like to spend. And if the job is done by someone else, you may not be pleased with the results. Fretted Alembics are renowned for their super low action and detailed fretwork. If you want it to play like a fretted Alembic, then you'll have to send it to the company.
Anyway, good luck with your decision.
Rami