Finally took a chance on one of those cheap eBay 486 boards from Ukraine. It showed up after about a month exactly as advertised! Listing said it sometimes boots and sometimes doesn't,
TS-486 motherboard (ALI Socket 3) \ VOGONS
The 486 CPU Era – The Birth of Overclocking. – Part 2 | The CPU Shack Museum
FIC 486-VIP - The Retro Web
The 486 Restoration – Part 1 – vswitchzero
Socket 3 - Wikipedia
Rare 486 Motherboard, Socket 3, SiS 85C471 Chipset , 486 66Mhz CPU and 8MB RAM | eBay
Mainboard: Generic Socket 3 | sparcie
486 motherboard, socket 3, Young Micro Systems, mb-sw486g-3vl-v11 | eBay
Rare 486 Motherboard, Socket 3, SiS 85C471 Chipset , 486 66Mhz CPU and 8MB RAM | eBay
486 socket hi-res stock photography and images - Alamy
Socket 3 motherboards and pushing their limits | ancientelectronics
SOLVED picked up a cheap faulty 486 vlb motherboard today UC4914-G \ VOGONS
Socket 3 motherboards and pushing their limits | ancientelectronics
486 Socket 3 -- HighwayGold Photo Gallery
ISA/VLB/PCI 486 motherboard I recently picked up. No fake cache here! : r/vintagecomputing
Socket 3 Motherboards - Retro PC Store
K-Systems - Chicony TK8880F / 2066A2 Socket 3 Motherboard, 486, PCI, VLB, ISA, Edo Ram | Facebook
foone🏳️⚧️ on Twitter: "The Socket 3 used by the 486 only provided 5v power, but the later Pentiums used in the Pentium Overdrive chips had switched to 3.3v." / Twitter
FIC 486-GVT-2, AT MB, SOCKET 3, 6X ISA, 2X VLB, INTEL CPU 486DX2-50, 4MB RAM | eBay