Imported Pages (xml) open with original theme, not current theme

I am creating a new quasi "main" (members only) section to my multisite installation. This is due to extensive header modification required in the original home page and sub-sites (Vantage theme). The header automatically pulls in the Area and Division name and numbers in to the header.

For this reason (and other considerations), I created a new blog - using the Catch Base theme.

I now need to import several pages from the main site in to this one. xml export won't work, it just overlays the original pages to

Is there a way to bulk inport pages and not have to duplicate them all?

Thanks for your help!!