Omega B – x25dt – After 10 years there are no spare parts at Opel anymore !!!

Good day, have the 130 hp – 6 cylinder – diesel (former BMW engine) with a mileage of now 175000 km. X52DT 4Gang automatic EZ 10/2000, i.e. 11 years old – car is since 2005 in my possession and “repaired”. Currently the line drips to the oil cooler. A new set of these oil pipes is officially no longer available, since Opel only has 10 years spare parts available !!! The plant says “sorry”, but the car is too old, there are no more special lines. Now I can still drive, but only until it no longer drips, but flows and that will certainly then be on the motorway with subsequent engine damage. Does anyone have an idea where one can get these “form parts” yet??? On the Opel “parts” side that would be the oil pressure lines E111, whereby one would probably also get installed, this is a successor version, but there is no longer any more with Opel, if someone could help there.