Triazeugacanthus affinis is a rare Palaeozoic fish. Rare because of the fragility of larval and juvenile specimens owing to their weak mineralisation and the scarcity of articulated specimens. But you can just take a cork and a 2 piece print to make your own. Here's the ref.: http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0174655 Print and recycle!