^^ Those are all great questions, and I hope you get some answers. Please let us know what you hear from Rancourt.
On a different note, awhile back I posted a pic of some roughout natty cxl Vibergs on here. Here is a description of the leather for these boot from Nick Horween (maker of the leather and owner of the boots). It's called Marine Field Shoe and is actually cxl with the roughside treated.
Kashiwa, is there any place to buy these boots, or were they an MTO for Nick Horween?