Not OP. Have you perused these references from the Wikipedia page for OODA loop? The reference to a “supposed slide set” sounds interesting; perhaps that is what you’re alluding to regarding source material being hard to find?
Boyd, John R. (3 September 1976). Destruction and Creation (PDF). U.S. Army Command and General Staff College.
https://upload.wikimedia.org/wikipedia/commons/a/a6/Destruct...
Boyd, John, R. (28 June 1995). "The Essence of Winning and Losing". danford.net. A supposed five-slide set by Boyd.
An interesting video from another time this came up on HN:
https://www.youtube.com/watch?v=gdK4y6O-llE
> OODA Loop & Evolutionary Epistemology of John Boyd by Chuck Spinney
From this comment:
https://news.ycombinator.com/item?id=26466750
They also mention a video by Chet Richards and how it relates OODA to business context.
https://www.youtube.com/watch?v=6hDhznBtN24
The Q&A with both Chet Richards and Chuck Spinney is also worth a look: