I am after the tubes for an Osram Dulux-EL 15W from the mid 1980s. I have a Dulux EL 15 here, the impedance converter is O.K. but the tubes are broken. I wish to replace the tubes with "new" ones of another Dulux EL 15 with a stuffed impedance converter or from a Dulux-D 13w, which would have the same type of tubes. The tubes must be Osram or Wotan as Philips and Sylvania had a different method for bending the tubes.