I publish my Spareparts i constructed for my own. Feel free and make one! or Remix it.
My parts have a snug fit. Maybee you need a drill bit to clean out the holes a bit.
I printed them as shown, used Raft because the layer are stronger in this direction.
Have Fun Printing and Racing
Amazon Basic PLA
Print as placed. I used supports. Because its stronger in that direction of printing