Took longer than that for me. The first time I asked them, and they checked the system, they said there was no build week entered against my car. I checked with them a week later and they said the build week had been entered at week 35.
I can't remember now how long that was from ordering, but I did record it somewhere in another thread. The dealer said I could change my spec until the car was showing in the system, and that would probably be two or three weeks from actually ordering.
Rolfe.