[e-Newsletter] e-Newsletter to .pdf option

I think it would be a great to be able to click a button and turn any of the e-Newsletters you've created into a .pdf... If this feature was added, we'd be able to archive the .pdfs for users to download -- if they joined late and were interested in a previously published item, for instance.
I'm new to using the e-Newsletter plugin, so if this feature already exists, my apologies!