network device backup solution for azure

Hey all,

Doing a design for a hybrid cloud deployment, I would like for the on-prem devices (switches and firewalls) to be backed up into the cloud (Azure),
Looking at the Azure Backup offering that is only for the on-prem solution (VMs / apps as offered through Azure).

What does everyone suggest for this job? its a small scale deployment, max 5 devices to be backed up, looking for low cost solutions.

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Thanks