From my experience this will be difficult.
If in EU search for 'GS Semiconductor fuses' ' IEC269 -IV'
If in USA try 'Norberg~IES 4237 South 74th East Avenue Tulsa, Oklahoma 74145'
But I did not see any small fuses above 1000/1200 Vac.
You might put RFQ to one of these, or similar providers.
Provide the the fault level and type of bus protection upstream.