I have a Disney Couture necklace from Adasa.com. They're going out of business so I'm not sure if they have any left, but if they did it would be on sale! This is the one I have:
It's gold plated silver and it was <$40. I was surprised how good the quality was when I got it. It looks like an expensive piece IRL. The only Disney branding it has on it is a tiny disc engraved with "DC" at the clasp. I would definitely buy more pieces from them in the future if I saw something else I liked!