My oil cooler threads are wiped out after removing the oil cooler line.

I have read the articles surrounding the repair solution for the 300 series by cutting off the thread, drilling, tapping and installing a screw fitting from the dealer (part #915013-013002).

This part has an M18 thread that would screw into the oil cooler and an M22 where the oil line would screw into.

I need a similar setup but with an M25 since the line is bigger on these cars.

Can someone recommend a solution - I have tried the McMasters and Graingers of this world but cannot find anything. My last option is to have a machinist fabricate something but I was wondering if anyone has any other thoughts out there...

Thanks,
Paul