Rothwell parish church has it's own website, found easily enough by Googling or there is a link on the Genuki website. It mentions that work on a map of gravestones is ongoing but a job for the winter months, whatever that means.
I visited the church about four years ago and the churchwarden mentioned then that they were working on a graveyard map, so it's obviously a long-term project.
Genuki also has a link to Rothwell's Local History Society who may have more information, chances are they're the ones who are organising the project.
Best wishes
Liz