I know that ripping websites was a thing back in the day and I could find private trackers/forums very easily full with everything I need, but now it seems like it's impossible to find these places.
Anyway i'm looking to find the assets from these 2 sites: muse-themes.com musegrid.com
Do you mean to spider the pages on the tracker, or the data on the tracker? Understand that can easily expand into many terabytes, if not many petabytes (depending on the size/content/format of course).