Yes, I agree projack. I prefer to buy something I can see and touch. I am wary of buying jewellery via ebay.
There's one in the Brisbane Arcade off Queen street mall which probably has / does what you are after - don't know the name but I've browsed a few times - pretty pricy high-end stuff. ETA - sorry just saw you are after antique ones - this is a new jewellery store but which can make custom jewellery.
Parker international in Brisbane Owner is Kevin Parker known him for 30 years Just say Schultzie gave you the name