On my board I spec’d and have used Winbond W25Q128JVSIQ TR 128Mbit/16MB 8-SOIC (0.209", 5.30mm Width) which I believe is what GHI uses.
Apparently, that is a popular one and everyone is out of stock. Does anyone know of a cross to different manufacture? Looking for about 50pcs. Digi-Key has various other manufactures that look like they would work but I really would rather not guess.