This model has different radius on the curve to fit the stock tenere bars snugly. You can slide it to make it tighter.
I have used it for sometime now and it's staying in place without ziptie.
I also added version with ziptie hole but I haven't printed or tested that version.
Print it on it's side so it's flexible and strong on the part that goes over the bars.
I used PETG. ASA/ABS and PA-CF would be ok aswell. PLA most likely will melt in the summer.
---Update June 2024---
I've used this for couple thousand kms in mostly summer but also during winter and it's working well. Printed in PETG
The author marked this model as their own original creation.