Richards only ramping firmware is RampingIOS, sometimes called the D4 UI. It’s a more basic version of Narsil.
If you want actual NarsilM you’ll want to order drivers from Lexel in Germany. He does a much wider selection of drivers and sizes for common lights.
I use NarsilM (from Lexel) in my 2 work lights in my signature. RampingIOS is a reduced version of NarsilM. It has no mode set option like switching to low, med, high, etc… It’s ramping only.
I personally don’t work on outside lights.
Lexel does mod the MF01 and has the special tools to open it, but shipping might be expensive.