Perhaps this is what you are looking for  ?    https://wiki.firestormviewer.org/fs_older_downloads   Not sure if the following is useful for you but if you are uploading with Firestorm you can still choose the  the old GLOD option  for auto generating the lower LoD models. In the mesh uploader under Source, for each of the lower LoD models you choose the Generate Reliable  option. (= old GLOD method). The following is a screenshot from Inra Peys "Living in a modern world
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