I am using the DEDA Superbox with the Deda DCR integrated 1.5 headset which is similar to FSA SMR (but not compatible). Might be an alternative.

https://dedaelementi.com//headset-dcr
https://dedaelementi.com/superbox-bike-stem

Thank you people for sharing experience with this frame.

What kind of hardware is included? two axles, rear hangar for sure. what about headset and spacer?