Amazon seemed to have everything I was looking for! I found a Suzi Chin grey dress and this super cute (and cheap!) lace necklace. For completeness, I added a clutch and suede shoes :)
These items are still in my Amazon cart because I'm waiting on reviews for the Suzi Chin dress to see how it fits. Living in Australia has its disadvantages when it comes to shopping online from overseas retailers. Unfortunately, it's costly to ship and return if it doesn't fit :( So I bank on reviews to help with my buying decision. If anyone wants to give this replikate a go, please let me know how you get on!