..as i sometimes do run out of memory on my arduino projects i did search for some other options than reducing amounts of data used..
For example in my recent project with display a display buffer does eat 1024 bytes of 2048 bytes total so there is not much SRAM to work with for the rest of the sketch..
23LCV512-I/P 64kx8bit SRAM 20MHz SPI
IP12B256I-TU 32kx8bit SRAM 20MHz SPI
IP12B512C-TU 64kx8bit SRAM 20MHz SPI
read/write operations with modified library
read/write simpler way directly from sktech, without library
update 29/3/2017: ICs ARRIVED!