Hi,
this is still a 2.5 Ltr. right ? You bought it from private or from offroadtrucks.eu (Hubert R.)
The website from china is
https://www.suonama.com.cn/It`s always difficult to get part for the WM`s, because it was only used by militär, public authorities etc
Here you can find WM related infos, we gathered so far, incl. the belgium spare parts catalogue >
thread