Need new water tube 10" loop-line

Cannot find this tiny hose anywhere. It goes in the back of the fridge if you are looking at the back of it it’s in the lower left corner connecting two little boxes/valves, it’s not the main Waterline coming in from the main. It sits right above the black compressor so it dried up, cracked and leaks. I need to replace it so we can use the water dispenser without having the water leak all over the floor. I need to buy this ASAP. Who will sell it to me? Where can I get it and what is it called?