There was a post some time ago that mentioned Breathing Color was discontinuing their Belgian Linen White. At the time they only had some 60" rolls left so I bought one with the intent to cut it down to fit my 44" P8000 when I run out.
I just got a call from Alex at BC who told me they have been able to procure some 24" rolls (Belgian Linen White, not Natural). It's too narrow for me but thought I'd pass it on. You will have to call them (ask for Alex) as it won't appear on the website.