565/2225L or R 25mm Cabinet Slide End Bracket

The other day, I got sick and tired of the look of our silverware drawer sagging to one side and it feeling flimsy you opened it. I tore out the drawer to find the rear slide rail brack in the back of the cabinet was broken. The kitchen was remodeled in the 50 and the cabinets are beautiful solid hardwood and the aesthetics are your traditional mid-century modern kitchen from the 50's. After all those years, it's no surprise the plastic hardware was starting to show its age. 

I searched and to my surprise found a few models for other rails but none of them fit, despite the design looking similar. The rails had no brand markings on them and only the numbers 565/2225L and 565/2225R (presumably for Left and Right). 

Googling this found others with the same issue. In a nutshell, I discovered the following facts during my research: Mid-Century cabinets, broken slide rail brackets, no replacement parts available, subpar mounting brackets, recommend replacing with modern rails. Now there's nothing wrong with the slides and if you haven't priced out new rails, they're $20-25 for a good set of 22" soft close rails! The existing rails have held up quite well other than the brackets and I have 8 drawers. $200 is a lot for new rails that will need the optional rear rail mounting kit at another $5 per set. Not to mention, I am rehabbing these cabinets in the near future to a more modern look and will be removing some of the drawers later for expanded storage solutions. This sounds like a solution for 3D Printing!
 

I fired up my CAD software and after a few failed iterations, I came up with a stronger version that prints well, prints in under an hour and is stronger than all the existing brackets I'm going to replace.
 

I have replaced two already and the rails slide right in and mounted to the rear of the cabinet perfectly. The dual mounting holes and curved vertical (horizontal when mounted) support are the perfect upgrade because it ensures the rail won't twist (which is how the old ones broke) when loaded up.