I really hoped this would work but it doesn't.

When you click cancel, it will start storing the files in cache. You can see
the filenames zipping by real fast.

But when it's done, you check the size of the folder of your saved website and
see the 8GB you downloaded today is gone.  

It was 6GB when you started, 14GB at the point you click Cancel, then now it's
back to 6GB.

This happens erratically, can't be predicted.  No wonder this barebones of a
Javascript-less website is taking forever to download.   

Only solution I've found is to run your laptop 24/7 until it's done.  I
haven't tried the Virtual box method.