Print Gantt to Arch E (and other Large Format Sizes)

We would like to print out the NEW features Gantt Chart to a large format plotter. When exporting to pdf, the only paper sizes you list are small, with the max being tabloid. Could you add 'Arch E' and any other desired large format options to the 'Export to pdf' page? ...I use Arch E becuase most plotters have 36" roll paper, so teh 36" x 48" size is perfect printout and great size to hang.