Blender has "weight" but no part?

[gcwlego]

New to blender, I downloaded it to look for some parts that aren't available on studio. I saw one part, 54937, listed at http://www.peeron.com/inv/master.txt and https://github.com/remig/lic/tree/master/.settings. I also looked on https://www.ldraw.org/cgi-bin/ptlist.cgi. For my download, I found part 54937 in weights but the actual part doesn't show up.

Why is that?