Does anyone know the eeprom used in the meriva B ipc's?

it may be the same as the astra ipc, but i believe the insignia ipc's use a different eeprom,

i want to get a spare eeprom when i buy my eeprom programmer, as i've read that if i need to change the mileage down when altering the data to make the other ipc work in my car, i need a new eeprom.. not sure what the mileage is on the ipc i've bought from abroad, so i just want to cover my bases incase it has a higher mileage than the 87k i've done in my car.