They... uh... know that Autodesk is used in a lot of airgapped SCIFs, right? This was always our problem with moving flight simulators to pure SAAS: if the Air Force couldn't use it we couldn't afford to make it.
[1] https://www.oracle.com/us/corporate/contracts/processor-core...
Why not make a custom build that connects to a local server? The Air Force can probably pay whatever fee you ask if they want it enough.