That was going to be my question
On our '99 4.6 we had some bright orange liquid in the passenger footwell up under the glovebox. Heater core needed to be replaced. Inexpensive parts, but a hell of a lot of labor. I was told that the shop labor number is about 8 hours. Luckily we have a Land Rover Assured warranty that covered it.
As an added bonus, after taking the entire dash out of the car, it was put back together tightly, and there are no more squesks or rattles in the front of the car.
Good luck, but if you are out of warranty and cannot get a goodwill fix, I think you are looking at over $1000 USD to get it fixed. An independent may do better.
Gordon