If you can’t find an omega you want on timezone or watchuseek then I’d just call around to some AD’s and see who will give you the best deal.
For an ORIS you might want to check out http://www.worldlux.com/cgi-bin/navigate.cgi?dept=watch&brand=ORIS I’ve spoken with them several times about a Rose Gold Alpina and their pricing is EXTREMELY good compared to list.