I just found the plugin in a repository, I post the link for anyone to want download it.
I also add the link to the full repository, it contains a lot of rex plugins converted to C3 runtime. I hope it is functional.
"CSV plugin by rex" converted to C3 runtime: drive.google.com/file/d/1Kwp-_2h8GvT971AmBwhdSufR_FbmbCbu/view
The other REX plugins: wasthataddonported.surge.sh