DO YOU HAVE A DOWNLOADABLE FILE ARCHIVE
I think you may need to better define what the goal of the system is.
PDM or a "vault" is used within a company to check files in and out, and to maintain revision control.
You can send your files to anyone, but they would not be checking them in or out of the vault. They would essentially be "orphans" at that point.
If you had to have someone in another location with access to your PDM software, maybe you could setup a Virtual Private Network. They'd tunnel into your network, and essentially be a part of it with the ability to check files in and out.
It sounds like a terrible idea, but maybe some better options exist if you can define the goal(s).