Hi Samuari,
The command team is actively reviewing the uniform for HEMS which may include minor adjustments such as a backpack, though this is something not certain at the moment. This will be considered during the review of the HEMS uniform.
Meanwhile, you can use the ALS kit that you can grab out of the boot of any HEMS vehicle as a prop.
Regards,
HE-01 Joshia
HEMS Team Leader