Commercial SRAM with separate power supply for the core and peripheral?
No.

There's no point. The vast majority of the transistors in the SRAM are in the core. If the chip uses a manufacturing process that results in low-leakage transistors there, then the tiny fraction of additional transistors in the periphery are low-leakage, too.

And most SRAM chips turn off things like sense amplifiers whenever the chip is disabled through the CS input anyway.