Can not find the Cisco CSR1000v image to implement it in GCP

I would like to implement Cisco CSR1000v in the VM instance, but I can not find it between the operating system images in GCP, nor in the personalized images nor in the market.
I am following the tutorial below:
https://www.cisco.com/c/en/us/td/docs/routers/csr1000/software/gcp/b_csrgcp/b_csrgcp_chapter_01.html

Thank you!