Unfortunately, we have all been left in the dark somewhat, Thomas hasn't posted anything whatsoever about recent rumours, and conspiracy theories about going legit.
Indeed, this one is an interesting A7750, it has bog date, doubt it would work in the Blackbirds though, but it may, only one available.
http://www.ebay.com/itm/Clone-7750-Automatic-Daytona-Chronograph-MVT-28800-Noob-Lowest-Price-Big-Date-/182513861941?var=&hash=item2a7eac8535:m:mMBNSR3sauvICZbAiucz8Mg
Where are you located? I make click springs for this manual wind movement, its their weakest part.
Should you wish to go the new movement route, then you can get new Venus movements from alpha watch.
http://www.alpha-watch.com/sub.php?list=10
Well they used to sell movements, but are currently only selling stems for some reason, so maybe drop me an email.?
http://www.alpha-watch.com/contact.php
Welcome to the forums. Do yourself a favour by measuring the dial diameter, and the inner rehaut of the case using a calliper, this will give you some idea if it will work or not before shipping to a modder. Also trial fit to check stem alignment also.
Ive narrowed down my search to these two crowns.
9 x Ø6.60mm Screwdown SS (7.60mm)
Cousins ID 42274ST
9 x Ø7.60mm Screwdown SS (7.45mm)
42277ST
The GMT model I need the crown and tube for is listed as a 43mm model on Omega site.