If you don't want to bother, let me know ( I realize that I've only been here for about a half hour, but...)
What info do you want? I worked for their second dealer in the US and we sold so many of those, Jamo had a hard time keeping them in stock. I still have mine too, but one voice coil is open.
Originally, the surround was butyl rubber and I suspect that the foam was used because Phillips discontinued the rubber version, which I think was a mistake on their part. The rubber last much longer.
As long as you haven't tried to play them with the surrounds gone, the voice coils may be fine. Orange County Speaker sells recone/refoam parts. When I called Madisound, the guy swore up and down that Phillips never made a driver for a cabinet with that internal volume, so if I call them again, I'll ask for Larry.
If you need to replace the woofers, cross-reference to the Phillips/Amperex AD7068/W8 driver. If you can get butyl rubber surrounds, you'll probably never need to touch them again.
As far as cleaning, what do they need? The cabinets use a very thin veneer and lacquer was sprayed over that. I wouldn't use a water-based cleaner, unless it was just a damp cloth. If the veneer in completely intact, you could use naptha to clean them and if they have been waxed, mineral spirits should remove that (maybe the naptha will, too). I'm not sure you'll find an exact match for the grill cloth but dark gray is still available.
Walnut or Rosewood?