Try using the new pypi instead: https://pypi.org/ locate the package then override pip to look for that package with the direct link to find the package with a command line arg of : -f

ex:

pip3 install -f [direct url to pypi page to package in question here]

According to pip's documentation is says this about -f
If a url or path to an html file, then parse for links to archives. If a local path or file:// url that's a directory, then look for archives in the directory listing.

Hope this helps.