INSURANCE FOR MY MOTHER ARRIVED ON RESIDENCE VISA

My mother arrived on residence (permanent) visa in Saudi Arabia.
She has successfully completed the medical checkup.
She need to get an insurance policy. This is where I am stuck.
Medical check & insurance are the two requisites for applying for SAUDI IQAMA.
Here are the other details:

As with other dependents such as wife and kids, I am the sponsor for my mother.
I am working in a petrochemical company which has 100+ staff.
My company advised me to get insurance for my mother from an external insurance company as these expenses will be borne by myself.

How can I get insurance for my mother? Which company will support this requirement?

I am running out of time. Kindly advise urgently.