I purchased 2 beautifully expensive upholstered Gubi Chairs back in December 2005, and a year and a half later they both started to develop bubbles in the curve where the base meets the back.
The chairs are molded wood with foam padding and upholstered fabric.
After contacting the store I bought them from, the manufacturer (in Denmark) deflected responsibility for their product by saying since they could not "take a closer look at the chair and don't know how it has been used or handled" and I should take it to a furniture upholsterer...
So I had a man from All Furniture Services come by and he said the fabric had shrunk... which caused the bubbles, and it wasn't worth fixing, these things happen he said (not the answer I was looking for).
He suggested weighting it down and it would stretch back into place. Well after spritzing the fabric and holding it down with a pumpkin for almost a week, nothing changed.
One missing piece to the story is I had them professionally cleaned, but it wasn't till 6 months later that the bubble problem appeared, and the care instructions for the chair recommend a foam product, so that shouldn't be the problem, eh? What would you do next?
You see to have done excellent research, and we wish we could insert a ray of hope, but you now know far more than we do.
This is the problem with modern textiles and manufacture. They are not intended to be fixed or to maintain themselves very well over time.
We would think, however, that the chairs could be fixed if they were recovered completely and that the proper adhesive is required to reapply the fabric to the foam. Why not price out recovering them?