I don't think the address line order actually matters in this case. Yes - you will end up, reading a different memory cell compared to the correct RAM type, but you will always end up at the same cell. SRAM does not care about order as long as you are inside the address range.
But the price and availability is an other issue... :-(
Edit: IS61WV51216 and IS64WV51216 do have the same pin layout (they share the same data sheet too), so you have the address line renumbering issue in both. If there were sockets for 44-TSOPII, then this would be a simple issue to test (or if someone have some professional resoldering station that removes SMD without damaging the PCB).