Masecraft are, or were, listed under the PG supplier section.
They are well known worldwide (i know the British Museum use them) for their synthetic alternatives to horn, tortoiseshell and ivory as well as thier recon stone. Are you sure the rods in your posted picture are animal horn, looks mighty like substitute as oppossed to natural horn to me and yes, it does smell as it's based on milk protein apparently - well, that's what they told me anyway.