So far, the only people with swap firmwares are people who have made it themselves.
I have not released a 811S swap firmware yet because there is some testing that we think still needs to be done. Notably, both C0deKing and I have recently gotten new batches of Ricoh R01 media. These new pieces of media seem to be working better without the Ricoh swap than with, so we're investigating this.
In addition, I'm looking at doing a Ricoh strat replacement (not a swap). So as a result of both of these reasons, we currently do not have any plans on putting out a 811S swap firmware.