Stage 1 V8

I've recently blown a radiator - any used radiators out there?

Unlikely.

Just take it to a good quality radiator repairer and have it recored. I got mine recored with a triple core and have no issues with it since (still been getting hot this summer, but road temps of 40ºC+ will push it up).

While it's out, replace the water pump too. They are reaching end of life now. Make sure you get the long nosed pump and not a standard Rangie model. You can get them from Mamaku 4WD.

Where are you based? I may be able to suggest one or two places for radiators if you are near me.

I have a NOS radiator here - but on the other side of the world..