Nikon bayonet mount replacement parts?

Hi, my nikon 18-55mm kit lenses bayonet mount just broke. It was plastic and all worn. I was wondering if anyone knew where to get a metal (instead of plastic) bayonet mount for my lens?

Any competent camera repair shop can do it. They may even sell you the parts if you are handy with small tools.

You can buy them on eBay.