I’m not exactly sure if it’s possible but here’s a few resources that might point you in the right direction.
There’s a list of available XML hooks and filters here https://www.visser.com.au/documentation/store-exporter-deluxe/actions-filters-reference/
And a few XML Snippets here
I think we spoke on support, in which case the ticket will still be open for Michael to look at when he comes back. If you have any more details please submit them to https://www.visser.com.au/premium-support/