Replacement cooling pipes

[Freza]

http://foc-u.co.uk/index.php/topic,24057.0.html


So, my cooling pipes are gone
My mechanic tried to save them by welding them, but it didn't help.
They have been eaten out from the inside. He says it's because they're made of iron.


I tried finding them online, but no luck so far.
I'd appreciate it if you have any ideas where I could find them.


Thanks!