Any AICS-pattern magazine made for the appropriate caliber will work. Doesn't have to be a Bergara magazine. Many companies, like Magpul, Accuracy International, Ruger, and Alpha Mag make them. They're available in steel and polymer.
We carry Bergara, Magpul, and other brands of that magazine at TruPrep in Marietta. I can also check out what you've got, and check the torque on your action screws.
