No, there isn't, and there never will be. The workstation market has motherboards with dual IOH-36D chipsets for dual-CPU systems. IOH-36D is equivalent to X58.
Look at the Supermicro MBD-X8DAH+-O. 18 DIMMs, Dual-1366, Dual IOH-36D... LARGE, but with firewire, audio etcetera, which workstation boards usually lack.
Daimon