I found it. An mitx sized AM3+ motherboard. : r/Amd
High Quality Amd Motherboard A780 2*ddr3 Am2 Am2+ Am3 Cpu - Buy High Quality Amd Motherboard A780 2*ddr3 Am2 Am2+ Am3 Cpu Product on Alibaba.com
Cryorig C7 Top Flow CPU Heatsink 47mm SFF 115x AM3 Mini ITX | eBay
ASUS M4A88T-I Deluxe AM3 Mini ITX AMD Motherboard - Newegg.com
For Mini-itx Small Motherboard Multi-platform Cpu Water Cooling Radiator For Amd/intel Motherboard New Original Corsair H5 Sf - Shell&body Parts - AliExpress
Sapphire IPC-AM3DD785G Socket AM3 DDR3 Mini ITX Motherboard Review Result and general impression
And a couple from AMD... - Computex 2010: Motherboards
Sapphire IPC-AM3DD785G Socket AM3 DDR3 Mini ITX Motherboard Review Result and general impression
Amazon.com: Suitable for Acer EL1350 Motherboard DA061L3D DA061L-3D Mini-ITX ITX HPTC AM3 DDR3 Small Chassis Motherboard : Electronics