Are the wr450 and yz450 radiators the same?

Are these radiators interchangeable? I have a 2003 wr450 with a leaking left radiator and a line on a yz426 and a yz450 radiator.

As I understand it the WR radiators are a bit larger and hold more coolant.

Does anyone have a left side radiator for a 03 wr450? How about the name and # for a radiator rebuild shop. Thanks

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