When installing a Python 3 package with Pip, if the package to be installed calls for a dependency that is outdated or otherwise not available, you can get a local copy of the module, change its dependency lists, then install it from the local source.
This will likely be no big deal for the Python wizards out there, but it was a pretty nice victory for me, so I thought I'd better share in case someone else has the same trouble.
I was attempting to install the lastpass-python module: