A lot of the P&Q fabric suppliers sell 'extra wide' backing fabric which is 80" (2m) or more wide. Unfortunately most, if not all of them, are the same weight as the P&Q/craft cottons, nowhere near as fine as good sheeting.
Yes, this is the replacement site for the old Sewing Forum, but nothing to do with the old site, and better because the admin are active. If a problem is encountered it's always looked at promptly. Also the shock of the old forum disappearing has made a lot us realise just how much we need the group support and consequently it has all come together really well.
Thanks to Iminei, Mr Iminei and Francesca.