Shameless plug, so I'll apologise in advance
I've just put my A0 extended Pen Plotter complete with loads of new pens and draughting paper on the homeworkshop.org.uk site if anyone is interested. Had it for the last 13 years and it will plot superbly in Autocad from release 10 in Windows 3.1 to AutoCad 2004 under XP, and from A4 to 36" wide.
Peter