Offline DGX-2 OS Update from 4.2 to 4.7

I am trying to upgrade DGX-2 OS from 4.2 to 4.7 (450 driver) for CUDA 11 support, in an offline environment. The DGX-OS 4.7 Release Notes ( requires an internet connection to reach the apt repositories. I am hosting an apt repository in my offline environment, cloned using apt-mirror from another internet machine.

Can I simply apt-mirror the following sources: [ (bionic distribution), (bionic distribution), (bionic, bionic-r418+cuda10.1 & bionic-r450+cuda11.0 distributions)], and execute the “Updating from Release 4.1 or Later” update instructions as detailed in DGX OS 4.7 Release Notes?

If not, what will be the recommended way to update the DGX OS from 4.2 to 4.7 in an offline environment?