I would add a third method, which is actually similar to the one with .prn and .ps John mentioned, but with (1) exporting to PDF instead of printing to .prn/.ps, (2) importing that PDF file in Scribus via Image Frame as you'd do for images in general (3) and, finally, when exporting to PDF from Scribus, in "Save as PDF" dialog checking "Embed PDF & EPS files". The advantage of this approach is that text in tables will remain exactly that: text, meaning it will be searchable in the final output.