I've been looking on strings direct to order some new strings and when selecting model of bass there is an option for Alembic Mo Foster. Never heard of that model. is it some kind of signature?
https://www.stringsdirect.co.uk/collections/bass-guitar-string-sets?filter.p.m.specification.instrument=Bass%20Guitar&filter.p.m.specification.instrument_model2=Alembic%20Mo%20Foster&sort_by=manual&;

This was Mo Foster's Alembic Series bass

https://reverb.com/item/73445768-alembic-omega-natural-ex-mo-foster

Foster's story about his Alembic, quoted in the listing Rob linked, is quite nice.

A couple good pictures of him with it (both before and after it was stolen):