I found it. An mitx sized AM3+ motherboard. : r/Amd
ASUS M4A88T-I Deluxe AM3 Mini ITX AMD Motherboard - Newegg.com
Best Mini-ITX Motherboards: Holiday 2013
ZOTAC 880GITX-A-E AM3 Mini ITX AMD Motherboard - Newegg.com
GIGABYTE B550I AORUS PRO AX AMD Mini-ITX Motherboard - Newegg.com
Used Mini-itx For Asus Rog Strix X570-i Gaming Motherboard Socket Am4 For Amd X570 Original Desktop Pci-e 4.0 M.2 Mainboard - Motherboards - AliExpress