Where can I buy a high quality Magen David?

This is the model I had but the gold passed after two months of wearing it (bought on Etsy) and I want to buy higher quality.

The star measurements are : 0.61 inch. x 0.77 inch. Ideally I’d like my new one to be this size as well.

Any idea where I can buy this one in better quality online? I’d like the gold to last a good while!