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Looks like it's a commercial product, so I doubt you'll find a freely available svg.

https://www.mapworld.com.au/products/australia-upside-down-w...

Although it also looks like OpenStreetMap has both country-level boundary and name data, so it should be just a "simple matter of programming" to create one's own svg (assuming the ISO 3166 countries are to one's taste).

https://wiki.openstreetmap.org/wiki/Nominatim/Country_Codes

https://osm-boundaries.com/ might be an 'easy' way to get the boundaries already present in OpenStreetMap.

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