ACI Alloys can supply boron in pure amorphous form, either as
hot-pressed pure targets, or as amorphous crystal evaporation pieces.
Boron alloys are quite commonly arc-cast: notable are
iron/cobalt/nickel mixtures.
(See boron in our
"materials made" page for
an idea of our capabilities--also try searching alphabetically
on each of the element symbols in the material you are looking for.)