Thank you David !!
To start off I want to mention that we try to avoid recommending specific devices to customers for memory and other external components. Because of the large number of choices out there it is impossible for us to have hands-on experience with all of them, and we don't want to recommend devices that we haven't used ourselves. We are at least indirectly recommending devices by including them on our EVBs and reference designs. So in most cases our best recommendation is to use the devices we have used or at least find something similar that will meet your specific needs.
A memory used on EVB is Cypress CY7C1339G
Also I could mention other devices used with different EVBs along with similar MCU having the same or backward compatible EBI module:
CY7C1338-100AXC
CY7C1338G
CY7C1471V33
IS61LF12832
IS61SF12832-10TQI
IS61LF25636A-7.5TQLI
Hope it helps a bit