These seem to be squirreled away on the website in the “media releases” section at the Smithsonian! It is well worth getting the high-resolution images. There is one solid, NWC art page here (from where the lovely Cowichan spindle whorl to the left is from) but additionally here are high resolution pictures of:
an Alutiiq (Koniag) hunter’s hat, ca. 1950 Kodiak Island, Alaska (Spruce root, paint, glass beads, dentalium shells, wool cloth, sea lion whiskers National Museum of the American Indian, Smithsonian Institution Image: 6/9253)
Quinalt woman’s dentalia breastplate ca. 1880 Washington state (Hide, dentalium shells, glass beads, cordage National Museum of the American Indian, Smithsonian Institution Image: 2/7703)
Tlingit Rattle, ca. 1880 Alaska (Alder or maple wood, hide National Museum of the American Indian, Smithsonian Institution Image: 8/1650AQ)
Raven Steals the Sun (in blown glass! by Preston Singletary (Tlingit) Seattle, Washington, 2003)