Another Defender newcomer! Defender 110 comes from Dubai

I bought a Defender 110 Bj 07/94. A friend bought it from Dubai half a year ago and registered it as a truck in Germany. It should be a 3.9 liter engine with 182, which apparently only existed in the USA. Now I’ve been looking like stupid for parts, because I want to make it completely technical, but I can’t find this engine anywhere. Where can I get parts?