I just made 5" bulkplates on my rotary table for my 5" Anaconda a few months ago. I think I might have some additional material but Nat can probably get you the stuff you need faster.
Protip: Send him dimensions with three decimal places along with your tolerances. He loves those.
My bulkplates were made from 1/4" G10. Go big or go home.
That being said, I might still have the bulk plates from the original av bay that came with the Anaconda. I can look.
I now know of three other individuals with a 5" Anaconda. Dr. Reese, Braden Carlson, yourself and myself.
Argonia drag race in a few years?