He works on very complicated watches from another brand and is one of the best. A dealer asked his if he would service a PP pocket watch of a VIP client and he did it a couple of times charging $200. Then one time he was too busy with other work and refused so they took the watch to Patek. The quote was 10K ...
I think the bottom line is - PP is proudly advertising the fact that they would service any watch they ever made. But they don't really want to, for purely commercial reasons!
Find a competent independent watchmaker, not a trivial but neither an impossible task.