A particularly well-known example in the German automotive industry is Leoni [1], they mostly make wiring harnesses for vehicles, but also for one-shot projects

A particularly well-known example in the German automotive industry is Leoni [1], they mostly make wiring harnesses for vehicles, but also for one-shot projects (e.g. spare parts for long-since discontinued models). Bit pricey from what I hear, but if you have a need just contact them. [1] https://www.leoni-special-vehicles.com/de/produkte/ https://www.leoni-special-vehicles.com/de/produkte/