TranzX YS105/ YSI13 dopper post bushing

Has the part number S-BSH-05-13 on their website. I'm not sure if it fits all models of these, I know it fits in the 34.9mm one. 

Its a part that always needs replacing because the brass keys are constantly hitting into it slowly breaking it over time. Who ever designed it had a interesting perspective on how plastic and metal collide. I couldn't find a place to buy them where I live so I just designed it and 3d printed it out. Every time I service my dropper this part pretty much needs replacing because of the brass keys hitting into it. Maybe I'm missing something IDK.