Can you help me find a necklace like this?

[thelittlesquidge]

I’m really stumped! I’ve always loved the look of this Tiffany Ziegfeld collection necklace - m.tiffany.co.uk/jewelry/necklaces-pendants/ziegfeld-collection-pearl-pendant-GRP08614/ziegfeld-collection-pearl-pendant-29898359?omcid=PPC_UK_EN_Shopping_Necklaces_Brand&mkwid=spT3lcX2a%7Cpcrid%7C211943308516%7Cpkw%7C%7Cpmt%7C%7Cpdv%7Cm%7Cproductid%7C29898359%7C&gclid=CjwKCAjwsfreBRB9EiwAikSUHTcsGS8MdwQvcnOaYgQlIFOxZn7ESq-WQUVPAa0XoTTfaFSqEfQichoCwCAQAvD_BwE&tfr=1

However I don’t really want to spend this much, plus I would like an actual authentically vintage necklace from the 20s/30s. Does anyone know of any similar necklaces or some shops that sell good antique jewelry?