oh man, if this whole story did not involve nicomouk ...
... i would be able to laugh hysterically about it. i can't believe the OP service center guys really can keep a straight face when saying that they want to charge 5k$+ for a dial swap and the service of a dubois depraz movement ... this sounds like some practical joke to me.
the tragic part is that apparently those jokesters are serious about those fees, and that a truly passionate fan of the brand gets repeatedly stuped (step 1: OOR, step 2: 203, step 3: service fees, step 4: stay tuned). way to cater to your customer base.
nico, i advise to photocopy your naked butt and send it to the OP service center with all the best wishes and a polite decline that they touch your mare nostrum. hang in there.
ciao, johannes