Nope, can't get the 5W40 M1 for competitive prices either. I couldn't justify any extra cost to myself when an LL-01 oil is available locally for under C$35/5L.I never noticed difference between M1, PPE and Castrol 0W40 in N52. In VW CC I had and VW Passat 1.8T, M1 was running rougher.
I track E90 and Castrol Edge 0W40 had excellent results. I tracked it with M1 too and PPE but never did UOA.
Can you get M1 5W40?
Are both of those EA888? I used the M1 in 2019 for 9000km in the 2.0 gen 3 because I mistakenly thought it specified VW502 at the time. Thought it ran rougher than the PPE that was in it before but I ignored it by closing the door before starting. The engine seems to make a big racket from the valvetrain for >5 min after starting below 0°C now regardless of what oil I'm using.