If I may hark back to my answer to your other question where I quoted

cadissier ouvrier faisant des étoffes de serge de laine
http://www.cevenols.com/vieuxmetiers.htm

I suggested "woollen draper" for "marchand facturier", but it would work here too (I strongly suspect there is little difference between "marchand facturier (en laine)" and "cadissier".

SOED:
woollen draper - A dealer in woollen goods
draper - 1. Orig. one who made (woollen) cloth. Subseq. A dealer in cloth, whence, now, in other textile fabrics ...

While the other suggestions are good definitions of the French terms, they are not translations reflecting the period. I believe these are. Not many French people will understand "cadissier" or "marchand facturier" without the help of a (very good) dictionary; I doubt many people these days know what a draper does these days, let alone what he specialized in hundreds of years ago.

another possibility