2001 A6 2.8L subwoofer and amp
 

So we had a heavy storm a few weeks back and during the storm my speakers went out. I took out the stock amp and Sub box. Some how water got into the housing and the amp was submitted in water. I was confused though. My Bentley repair book says it supposed to have a bose amp and sub. But when I took it out its a blaupunkt with part number 4B5035382. So I've been trying to find a replacement for this but all I can find in the US is bose setups. Does anyone know can I get the bose and will it plug in the same? From what I can tell is that they have diffrent wiring. Can anyone help me figure this out. Thanks