I'll write more in depth about it later, but I just read David Lynch's book Catching the Big Fish: Meditation, Consciousness, and Creativity https://bookshop.org/a/17195/9781585425402. He definitely has a zettelkasten-like creative process which revolves around "catching ideas". He talks about the philosophy and shape of his practice, but doesn't get into the direct physical form or substrate. He doesn't mention it in the book, but in the late 70s and early 80s his process definitely involved using napkins from Bob's Big Boy restaurant. He was influenced by his teacher Frank Daniel who had a practice of using 3x5 inch index cards for his screenwriting process. The book itself has a very zettelkasten-like flavor, almost as if he wrote ideas on index cards (or napkins), gave them some light arrangement by topic and then tipped the whole into book form without heavy editing. (It would be incredibly easy to cut it back up into individual index cards.) If you're into using zettelkasten for creativity (writing/creating), you'll appreciate some of his philosophy which he also wraps in a very light meditation wrapper.
This short video encapsulates some of the ideas and flavor of his book: https://www.youtube.com/watch?v=S2RFMCmfRmc.
Syndication link: https://discord.com/channels/992400632390615070/992428117467615333/1158852901192605828