Does anyone know where I can find 0.7 mm leads softer than 2B? I like to write with 4B, but my favorite pencil is now a 0.7mm.

Wow! I couldn't find any anywhere on the Net! I thought for sure that they would be readily available! But it seems that they are not! I hope that you have better success at finding some than i did! :(

The Pilot Easy-Lead refill comes only in 0.7 mm and I get the impression that it is supposed to be softer than 2B. It seems to be distributed only in Europe for now.