So here’s a custom Zotac card with a 4 8-pin adapter, not just a 3 8-pin adapter with a major caveat:
https://www.techpowerup.com/299162/8-pin-pcie-to-atx-12vhpwr-adapter-included-with-rtx-40-series-graphics-cards-has-a-limited-service-life-of-30-connect-disconnect-cycles
Limited service life with the adapter.