[Coco] EEPROM selection

[coco at jechar.ca]

All

Is there an EEPROM that can work at either 3.3 or 5 V and can
replace the Coco 3 motherboard ROM.
I saw an article about how to use the GPIO of a raspberry pi at
   https://www.instructables.com/Raspberry-Pi-Python-EEPROM-Programmer/
I wondered if such a setup could read a coco ROM and write to a
EEPROM chip suitable for a replacing the coco ROM and also
which chip would you recommend for this purpose the chip used in
the example is 4X the memory of a coco3 ROM.

Charlie