Deploy a file to the "Forms" folder of a Document Library using Powershell

I am dynamically building up a file that I then want to upload to SharePoint 2013 using PowerShell.

I want to upload this file into the "Forms" folder of a Document Library - So not into the Document Library itself.

I am trying to do this without creating a WSP file - Because I am dynamically creating a file, I just want to upload the resulting file I've created, rather than deploy the file as a feature.

I already have everything to create the file, but I don't know how to upload into the Forms folder for a Document Library.

Is this possible?