Engine oil cooler line replacement?

Hello folks,

I got a 2001 Concorde with the 3.2 engine. It's got an engine oil cooler
in 
it and the supply line that connects the cooler (upper radiator) to the 
control valve is leaking. Is this a hard thing to replace myself? Would it

be wise for me to use an old line off of a used car? The new line is very 
expensive from Chrysler dealers!

Any other comments or pointers on this is greatly appreciated Thank you.