Select Medical Challenger 350 for the KCAI model.
These are textures only.
The KCAI Challenger 350 model is required.
It can be found at https://jcai.dk/download/models/kcai_challenger300_350_package_fsxp3dv4_v1.1.zip
Flightplans available here: https://aibizjetproject.wordpress.com/tag/select-medical/