EuroCar parts sell the new G13 ( replaces the pink G12 ) for 8.99 for 5 litres of pre mixed or 12.99 for 5 litres of concentrate.
Easy enough to DIY, For what they cost you may as well throw a new thermostat in at the same time.
Have a look at your radiator on the drivers side, They seem to go in the same place.
Changed my rad 3 days ago, Will be posting some pics shortly.