About thirdparty

Holle, first of all, thank you for open-sourcing this work! I am interested in reproducing this work, but I encountered an issue when trying to create the virtual environment using the command (git clone --recurse-submodules https://github.com/AronDiSc/r3d3.git) as the third-party submodule (r3d3/thirdparty/eigen @ 2873916) is no longer accessible. Is there an alternative available?