You're welcome. I did a bunch of research on clock sync a month ago. The DIN vs MIDI and what accepts those was a point I hadn't nailed down. So I was hoping to learn about options & tech on this point also.
Ladik http://ladik.ladik.eu/?page_id=7 is EU based, I think Czech Republic, and I think 1 guy or mainly one guy. I've never needed to contact them; don't know how responsive a small shop like that can be.
The M221 unit, looks to me like it is expecting clock in at 1/4 rate, and it gives outputs at 1/4 rate and subdivisions of that. So the 1/4 out is your 1:1 clock out option. BIG plus is the M221 has start/stop & other CV outputs which would be a great help to link everything to a single set of controls.
Thanks to @plgrade, Jim and Lugia for adding clarity on this somewhat obscure topic.
Good luck!