DogBone replacement for Bezgar HM201

My brother bought my three kids each a Bezgar Hm201, and they have been really decent little trucks…except for the rear dogbones.  I bought a few replacements in a kit, but those two went out now, were over-priced, and now are no longer available.  

Went online to find some printable ones, but didn't have any luck.  Took a few for different trucks from printables, resized them, and even tried some with paperclips rather than plastic drive tabs…they all broke pretty quickly.  

Later after nearly giving up, I was staring at the drive cups in the rear wheels, and decided to try making my own non-circular design.  

Although I haven't extensively tested them, I've got a PLA, and a PETG-CF in the car right now, and will keep beating it up to try to get them to break.  They have outlasted my last three attempts, so it's something…  I am not a CAD guy, I designed these is Bambu Studio with just basic shapes, so it's not perfectly centered, and it does seem to limit some of the travel of the rear suspension.  If somebody with some skill wants to redesign, feel free.