I think it's a temporary problem. You could read in this forum that Booxtor is very present.
The customers of ereader-store.de are happy with the support after buying a device. I 've bought mine on this site.
For your question : there is an adapter and a cover for the M92. You could by the battery here : http://ereader-store.de/en/8-accessoires
. As booxtor said, the battery must be usable during some years.