Did you call NTB? I think there is one in Framingham or Natick? Here in the DC area there are about 5 NTB's, but only one of them (greenbelt?) will handle runflats. I don't know if it is because only one of the stores have the "superjammy" machine, or because only one store has the expertise. did you call the caddy dealers? Lindsay and Moore both handle runflats here, at competitive prices.