i'm not aware of any way to do that.
but you might want to get in touch with the document liberation project:
https://www.documentliberation.org/they're focusing on liberating people (and information) from the dying file formats...
you might be able to help them by providing ventura documents for testing (they mostly need empty document, with one text, with one image, with one style, with one footnote... i guess that you get it : - )
of course, scribus is already using several import libraries created by the document liberation project.
(and did i already mention that the document liberation people are really wonderful persons?)
ciao
a.l.e