https://www.realoem.com/bmw/enUS/partgrp?id=HF93-USA-06-2019-G29-BMW-Z4_M40i
Only thing I could find on the fly. Try a search in there. fcpeuro might have it. God damn the manifold looks sexy. I'm stealing that logo idea
As you can see there has been a massive improvement in airflow from gen 1 to gen 2.
This one is pretty good for the automatics. I'm not sure if it's going to work for the manuals tho.