See this as an opportunity to dump the runflats and greatly improve your car. I went from runflats to Michelin PS2s and ride quality, grip, greatly improved. Break-away characteristics less snappy too.
Only 2 downsides: turn-in is slightly softer and the worry over punctures (buy a get-you-home kit or, like me, get a used space saver spare and jack)
Run flats are the biggest POS I have ever driven on. I switched them and the car feels significantly better. One RF tire can cost almost as much as buying a set of 4 non RF.