[One page layout, multiple print formats]

Hello

I've been creating workbooks for print here in Australia (A4), in the US (US Letter), and more recently for download in a tablet friendly 4:3 format. I build one master workbook using a custom paper size -- the common area of these 3 page sizes -- export the masters to PDF, then use Acrobat Pro's print production tools to add page boxes and trim marks. So, repeat three times, one for each workbook format, and each with its own arcane combination of border box margins. It's tedious. Is there a better way to do this with Publisher?

Thanks for your help,

Mike