Only thing you really need after that is the Export to STL extension which is still available in the extension warehouse (although I suspect Trimble will break V8 support if this old version ever gets too popular)
Thanks for the suggestion, but people who know about Sketchup will find the link themselves and other people don't need to know about it as Sketchup 8 is quite old by now.
See this discussion
https://www.reddit.com/r/Sketchup/comments/or5xau/where_can_i_find_the_last_free_for_commercial_use/
and this one which has a link to the actual file
https://www.reddit.com/r/DataHoarder/comments/osfek8/hello_datahaoders_please_save_this_file_for_late/
Which leads to the backup on Internet Archive
https://archive.org/details/SketchUp-8.0.4811
Only thing you really need after that is the Export to STL extension which is still available in the extension warehouse (although I suspect Trimble will break V8 support if this old version ever gets too popular)