Has anyone come across any method to import CMS block content from another instance of Commerce?

We have a NodeContent structure and each of the NodeContent instances have ContentAreas which blocks are placed on.  We use a PIM system that generates the NodeContent and Product/Variant structure.  We've come across an issue that means we need to delete the Catalog and completely rebuild it from the PIM.  However, this means that all the content editors have added to the NodeContent items will be deleted.

We need to somehow save/recover or export/import this data after the PIM product export has been run.

Any tips?.....  much appreciated :)