Drawer socket part sourcing

My kitchen drawers are held in place with these sockets. One of them broke and I can see how to fix the drawer slide, but I can’t find the part to replace the broken one. The house was built in 2003 and I’d be shocked if the kitchen wasn’t original. Here are pictures of the broken part and what it mounts into - the peg on the back of the plastic thing sticks into the hole on the metal plate and supports the weight of the drawer. Help please?