I am fairly certain that Alembic has never made bolt-on necks. Even when they made graphite neck instruments, Modulus supplied neck-thru necks. While Modulus did make bolt-on necks (I have an old Modulus Blackknife neck, along with Alembic PUs and electronics, on my #1 player), I have never seen an Alembic employing one. If you want to build a Fender-type bass with a graphite neck, you may be limited to searching out an old Modulus neck. Another company named Moses also used to manufacture bolt-on graphite necks. They were a different design. While the Modulus necks were hollow, the Moses necks were solid. I have both. I prefer the Modulus, but the Moses necks are nice necks, too. I’m not aware of anyone currently manufacturing bolt-on graphite necks. Let us know if you find anyone currently doing so.
Bill, tgo