While building my Turbo Optima, I broke two of the sway bar attachments (OTW102.1 and OTW102.2). I designed parts to temporarily replace them awaiting for replacement parts.
As the steering connecting rod (OT203.8) is of the same material, and the connecting balls are the same, I did create the stl for it as well (I did two version and did not tested in real, but the design will allow to connect with the steering balls)
I can't guarantee those parts would be more durable than the original Kyosho ones, they are intended as temporary replacement while waiting for replacing parts and I decline any responsibility if you break something else using them. Use at your own risks.
Notes:
ideally, it would be even better printed in Nylon PA12 using MJF printing process