The original 205/45-17 run flat tire fitments were:
Dunlop SP Sport 9000 DSST
Goodyear Eagle RS-A EMT
Pirelli Eufori@
More recent fitments are:
Bridgestone Potenza RE050A RFT
Continental ContiSportContact 3 SSR
Dunlop SP Sport 01 DSST
I don't know what the factory is fitting in this size if you order conventional tires.
I'm running Kumho Ecsta SPT (KU31) XRP run flats on my MINI because they're a lot cheaper than other run flats.