Following up on my post about finding Azure Images by Publisher, here is how to get all the SKUs for the specific Offers.
Get-AzVMImageSKu is the command to run.
It requires Location, Publisher, and Offer.
For example: Get-AzVMImageSku -Location ‘eastus’ -publisher ‘fortinet’ -Offer ‘fortinet_fortigate-vm_v5’
This will return the two SKUs - “fortinet_fg-vm” and “fortinet_fg-vm_payg”
You can take the SKUs and use those to deploy new VMs.