There’s also a 1989 video interview with A. Ernest Fitzgerald available on C-SPAN.
https://www.c-span.org/video/?7175-1/pentagon-spending
Fast forward to 7 minutes and 5 seconds to see what seems to be a piece of clear plastic that was originally (around 1968) priced at $642.35 as a piece of toilet equipment for a C-5 military transport plane. Inflation adjusted for 2023: $5,679.09
His books on the subject are both on Archive.org
The high priests of waste (1972)
https://archive.org/details/highpriestsofwas00fitz/page/n3/m...
And The Pentagonists : an insider's view of waste, mismanagement, and fraud in defense spending (1989)
https://archive.org/details/pentagonistsinsi00fitzrich/page/...