[GP125] radiator

hey folks,
  does anyone have a used radiator that will fit or
work on a 94 rs 125. i know a new one goes for around
$400, so i am looking for something cheaper. i tried
using a tool to open the flatten parts of radiator,
but really has not worked that well. reason why i am
asking is because i am trying to run the bike a little
cooler. i use water, with water wetter, but can you
use distilled water instead?? will that help to keep
it cooler?? any help or suggestions are appreciated.
                                   thanks ,
                                        joe


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