Oh – I was using the term “open access” to refer more specifically to open access (non-paywall, with downloadable data) journal articles that have links to .stl files and other 3D printables. Examples of journals that are open access include PeerJ and PLOS.
Thingiverse and other online venues also provide access to these sorts of 3D printable files, with or without accompanying scientific data. Sources like Morphosource, AfricanFossils.org, and Digimorph have at least some accompanying data, whereas Thingiverse doesn’t.
Hope this helps, Lisa! @llundgren