From my recent experience, some run flats are repairable based on the manufacturer recommendations. My Bridgestone Potenza 235/40 was not repairable according to Bridgestone.
When I inquired further, Bridgestone could not provide me with a technical document that stated it was not repairable. I checked their web site and nothing was listed about repairable/not repairable. So, what to do now? mmm....
With installation it cost $460 (and they ruined my rim, but that is a different story).
2004 E60 530is, Delivered 12/12/03, TiSilver/LGrey, PP, SP,PS, PDC, ACC, FRS, Step, Xenons, clear bra, body colored rear inserts. (Retired, 1983 henna red 320is)
2004 Corvette Z06 Commemorative Edition