Used-PC Chips M535 Baby AT Socket 7 Motherboard, Intel 439TX Chipset, 4 PCI, 3 ISA, 4 72 Pin SIMM, 2 DIMM. Board only. Does not come with manuals or cables. - Walmart.com
S15904 Tyan Socket 7 Server Motherboard
Socket 7 motherboard - yes they are still available...
Super Socket 7 Motherboard with PS/2, Integrated Video, USB, Audio, 225Mhz CPU - Retro PC Store