I know it would be a lot of effort on your end, but it would be awesome if you could get the patch file circulating again back into the community!
It has been a very long time since manually installing Wii games, but I think its possible to retrieve the patch with a little bit of effort.
If you don't have the installer, you would first have to FTP into the directory of Brawl / Project M and copy the NFS files to your computer before the step below.
If you have the original installer file, you would need to convert the NFS back to ISO then create an ISO patch of the difference in the image. This would allow you to share the patch without any copyright code.
https://gbatemp.net/threads/semi-working-nfs2iso2nfs-convert-nfs-to-iso-and-back.455812/