There is a necklace based on one worn by Elizabeth 1 at Chris Cox's site.

http://dragonspace.com/wordpress/?paged=3

There is the Gloriana dress on sharecg by Jan19 which was already mentioned, there is also the Lady Anne dress on Jan's website

http://www.jan19.net/page3.php

Doesn't do the breast flattening this as is, but magnets are always an option