As others said, I'm not aware of anyone making bolt on aluminum panels with accessory mounting slots for the older AT chassis... the vision chassis and ATX are the current way to achieve that configuration.
You could have bought a vision chassis for your AIAT during the last couple of years and functionally you'd have what you are describing, but unfortunately the vision chassis for the AI was recently discontinued as it's likely the ATX ate into their sales.
The AI vision chassis do pop up in the PX from time to time, however with the "oldschool" thumbhole look getting more popular it might be cheaper to sell your current AT and get a used ATX rather than buy a vision chassis for your current AT and then have to go through debonding and swapping the action and potentially the butt stock.