Just received the following notification from Digi-Key:
You have purchased the following part number from Digi-Key within the last two years. The manufacturer has announced an update to the part status.
Manufacturer M5STACK TECHNOLOGY CO., LTD
Description M5PAPER ESP32 DEV KIT 4.7"E-INK
Manufacturer Part Number K049
Digi-Key Part Number 2221-K049-ND
Substitutes Please click here
Digging around leads to: https://media.digikey.com/pdf/PCNs/M5Stack/PCN20210513-01.pdf
Which contains: "The display driver chipset for K049 cannot be purchased and supplier from our vendor any more. We will look for new display driver as the alternative material. This version will stop for sale. "