You could easily reserve 128 bytes of flash memory and emulate the eeprom there.

You an write a single eeprom location with the 93C46. If you use flash, you can only 'blow' bits. Otherwise you need to erase a complete block of flash memory (unblow all the bits). Then re-write all 128 bytes.

So in principle, you can do what you ask. You have to check the data sheet to see if the erase and write times are acceptable. You will also have a lower write endurance limit.

David.