When I read the first post, this was the very first thing that came to my mind.
I would refrain from forcing them to work. It is possible, if it is a shifted magnet situation, that if they are dealt with carefully, the cones and voice coils can be saved. The surrounds, spiders and dust caps will have to be replaced, as the cone assemblies will have to be removed from the woofers, the magnets pulled off, cleaned, shimmed and re-glued, and the cones reinstalled with new spiders, surrounds and dust caps.
I've done this procedure before- and I have seen the results when people forced the speakers to move once the magnets had shifted. Very quickly, the insulating lacquer is rubbed through to bare metal, on the outside of the coil windings- when this happens, you might as well assume that the coil windings are shorting against each other. Once that happens, a total recone (and there are no factory kits available for these, PERIOD, so it would have to be an aftermarket kit) is the only solution.
As of now, it MAY be still possible to save these- but not if they're beat on to try and force them to work, as they are.
Regards,
Gordon.