So i have a 1998 GU patrol which was originally a 2.8 but has been converted to a 4.2 by the previous owner. Now the top radiator coolant tank has got a slight crack around where the hose connects to it. Im looking to replace it but so far ive found i can only purchase the whole assembly top and bottom tank) Which is going to cost around $170. Is there any possible alternatives? Dont want to fork out $170 if its just going to become brittle again and crack in a few years.