Relationships between distributors and manufacturers are a funny thing and have an often dark life of their own. If all your communication has been through the distributor, perhaps talking directly with Quad would be worth a shot vs. I'd hate to shell out more for repairs given the circumstances.+1
If you throw in the towel, besides Sanders, no discussion of great electrostatics is complete without consideration of Sound Labs. Sound quality exceeds everything I've come across and support is excellent, even for thrifty guys like me who bought >25yr old pair. Cheers,
Spencer
Recently (in the last4 years) the Sound Labs are not only a lot more reliable, but they are also a lot easier to drive (and as a result, sound better). IMO they are the SOTA of ESLs.