Edit: NB: the part code is actually CY7C1049- Old but still available and just in stock! https://uk.farnell.com/w/c/semiconductors-ics/memory/sram?sram-memory

Edit: NB: the part code is actually CY7C1049- Old but still available and just in stock! https://uk.farnell.com/w/c/semiconductors-ics/memory/sram?sram-memory-configuration=512k-x-8bit&supply-voltage-range=4.5v-to-5.5v&memory-case-style=soj https://uk.farnell.com/w/c/semiconductors-ics/memory/sram?sr...