This design is a spare part for the key holder of the Olle brand.
I did it because the Olle house did not offer me any spare parts.
Maybe it will work for other brands.
Print it with support.
Designed with Onshape. You can modify the model at: https://cad.onshape.com/documents/81c2ae0eec8fefe754ed8906/w/24001de4de85fa566849ff2a/e/21e8029e8c0bf8ed7a856bca