I came across [pex](https://github.com/pantsbuild/pex) a while ago. It basically compiles your package and all its dependencies into a single zipped module.
I never had the opportunity to try it out myself though.
It's not quite the same I think. The format is very similar, yes, and I think it'd be nice if the PEX program could be made to work with this PEP. However, the PEX program bundles dependencies, which this PEP doesn't seem to be explicitly about.
I never had the opportunity to try it out myself though.