In my divided Austria alternate history, I came up with a storyline for an export version of the Mirage IV as a conventional strike platform.
I did away with the fuselage recess in favour of a redesigned lower fuselage with a series of hardpoints for pylons and moved the radar from the belly to the nose.
The removal of the recess and the relocation of the radar freed up an appreciable amount of internal volume for fuel and reduced the need for drop tanks in some mission profiles.
The revised forward fuselage provided better visibility to the crew and opened up space for newer avionics.
I felt such changes might have actually made the Mirage IV more attractive in real life as an export prospect.
Apophenia quite generously did up a couple of profiles:
I've also thought the Mirage IV might have some potential in anti-shipping, SEAD or ECM missions as well.