If you're planning to buy gold at Costco's warehouse stores, you may need a backup plan. Here's where else to look.

There are plenty of items to load up in your shopping cart at Costco -- but gold bars shouldn't be one of them.

“The Newmont and MKS PAMP teams collaborated to deliver this traceable gold bar to consumers to honor their long-standing collaboration. The PAMP one-ounce Lady of Liberty gold bar is sealed in secure CertiPAMP packaging, which serves as a certificate of authenticity and quality perfection,” the Newmont press release states.