Went to some various places in Tokyo. Bought a note book cover with pen slit from Manso for around 15000 yen, made in bridle leather. Very nice and affordable stuff.
Also ordered a bag from Ortus. Thought long and hard about other details and what not, but ended up with just having the possibility of a shoulder strap and an extra pocket inside.
Now, 2 years waiting time.
Got some nice ideas for a future project. These were the nicest bags I've ever see.