who would be able to make me something like this?

I want a single strand (maybe with a dangly enhancer??) diamonds by the yard-like necklace about 15" long in yellow gold but with round and marquis citrines instead of the diamonds. I

I love the large square chain in this one and the bezels round/marquis combo. I've gone to the designer of this one but she won't customize it with citrines so I need to look elsewhere for an 'inspired by' version. I want citrines to match up with some bezeled citrine earrings that I recently bought see below.

Thanks in advance for the suggestions