I have a Precious Time Yacht-Master and a MBW Two Tone silver serti dial submariner. The two tone is also solid gold and has been confirmed by someone who has experience with gold.
If you definitely want one, give it a month or so, so he can see you are not a newbie, and then make an enquiry. Read his terms on TRC (hopefully he will come over here, I've emailed him about this place)., and be patient. If you don't get a reply straight away, be prepared to wait up to a week before sending another message.
Hope that helps.