Also Louis.de, one of the largest motorcycle equipment suppliers in Germany and Europe, has its own brand called Delo Power. There is one type which fits to 990. More infor here
. (in German). The price is ~116 Euros.
I picked up my bike from the dealer couple of days ago. They said the alternator was not working and they changed it within the warranty. According to them the battery is OK. I will wait and check by not using the bike for a week. If the bike doesn't start after a week then I will order this Delo or a Braille from UK.