My neighbor's kitchen drawers broke and he mentioned he couldn't find a replacement without completely redoing the drawer slides. I took a look at the other bracket and modeled up a replacement for the one that broke. This is for a “Scheirich PPW096” drawer slide. This attaches the slides to the rear of the cabinet.

I printed this in ABS+ on my Bambu X1-C. 0.12mm layers, 99% infill, and 5 walls. It won't be quite as strong as the original cast nylon part but should work for the purpose.