Just changed mine. Had to cut the hoses off the metal pipes as they were all jammed on. The only really awkward one is the bottom connection to the IRD cooler. Which connection is its spraying from ? There's three connections - heater inlet, thermostat, and IRD cooler.
Got mine from Dingocroft as they had the other parts I needed cheaper than anywhere else, but the hose is freely available from ebay or hundreds of LR parts dealers. What year is yours ?