The rear mount/support for drawer slides measuring 22mm by 10mm. The inner set of holes was copied off of the original model that broke to allow for easy line up. I added an outer set of holes becuase I figured if the plastic mount broke, the holes in the wood were possibly in bad shape as well and I wanted to be able to use new holes. I've also included my FreeCad file in case anyone needs to tweak for their particular slides. Most (everything but some hole spacings if I recall) things can be adjusted in the “dimensions” sketch rather than needing to be done elsewhere.

I printed these using a Pursa Mini with no supports. I used PETG with 15% infill. If I find out that this isn't enough infill I'll update, but we only have tupperware in the drawer that needed repair so I didn't feel more was required.