I posted the same thread on another forum, and I got the answer and it was on
http://parts.infinitiusa.com, where any part number can be found on their eStore, I need to improve my online searching skills!.
Anyway, the part cost (one tube) was 55$, but after a lot of research, I fixed the old tube with steel compression fittings.
The tube is basically 3/8" in size, and so is the hose connecting it to the cooler, as you see in the picture, the tube is damaged close to the hose connection, so obviously I was unable to cut out the damaged part and reconnect tubes, I actually had to cut out the entire piece in the picture along with the hose connection.
So I bought the following:
1) 3/8 compression fitting with ferrule x 3/8" NPT female connection (for first time use, you need to tighten very well for the ferrule to sit in place in such a way it is snug and can no longer move, you need to unscrew and check that is physically the case, this is critical for the integrity of the connection and to prevent leaks).
2) 3/8" NPT male connection x 3/8" clamp style hose connection
You probably can find a single piece of fitting with both required connections so you won't need to crossover, I did not have many choices in my case.
All in all was for less than 20$. After installation I took the car for a quick trip and came back to check on any leaks, none found and all is as good as new.
I hope this helps others who might have a similar issue with any of the lines (brake, cooling, fuel ...etc) as this can save you some money that you could keep for better use.
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