No, I do not know of maintenance organizations already implementing the Part M lite rules.
Afaik the rules implications are still under discussion and no clarity is reached what exactly is needed. I am pretty sure for ELA1 the first ones will be ready around years turn, but ELA2 - no idea how long that'll take.
There are some consultancy companies already selling documents for it, derived from commercial ops, but that may be far too heavy for what is really needed!
So, to my knowledge it is too early to say anything definite. For first impressions you may look into this famous german open documents bib for some freely distributed manuals
https://www.pilotundflugzeug.de/dyn/ops/AirdocsHome .