Is there a way to copy assets, without consolidating/filtering them using `flask-assets` or `webassets`?

Question

I'm trying to consolidate all the random things we do in our project to make things work. This SO question is about copying image files and fonts from their node_modules source to the right location in our flask application.

After a great deal of reading the docs and searching around, we cannot find a way to do this with Flask Assets. Hence, this question.

In our project, our designers create fonts and images and save them into nodejs packages. Our developers then consume the packages as-is with no need to perform any additional manipulation such as image crunching.

Is there a way to copy assets, without consolidating/filtering them using flask-assets or webassets?

Given:

/my-app
  /app
    /static
      /js
      /css
    bundle.py
    __init__.py
  /assets
    /js
      my-module.js
    /css
      my-modules.css
  /node_modules
    /my-library
      /scss
        my-library.scss
      /js
        my-library.js
      /img
        logo.png
        /my-module
          /my-module-logo.png
      /fonts
        font1.ttf

where bundle.py contains:

from flask_assets import Bundle


bundles = {
    'my_module_css': Bundle(
        '../../node_modules/my-library/scss/my-library.scss',
        '../../assets/css/my-module.scss',
        filters='rjsmin',
        output="css/my-module.min.css"
    ),

    'my_module_js': Bundle(
        '../../assets/js/my-module.js',
        filters='jinja2, rjsmin',
        output="js/my-module.min.js"
    ),
}

When this compiles, we get:

/my-app
  /app
    /static
      /js
        my-module.min.js
      /css
        /my-module.min.css
    bundle.py
    __init__.py
  /assets
    /js
      my-module.js
    /css
      my-modules.css
  /node_modules
    /my-library
      /scss
        my-library.scss
      /js
        my-library.js
      /img
        logo.png
        /my-module
          /my-module-logo.png
      /fonts
        font1.ttf

The problem is that my-library has an /img and a /fonts folder. I would like to copy that to app/static/img and app/static/fonts.

Is there a way to do this with flask-assets or webassets? Currently, we use a makefile to handle copying the images and fonts.