Not sure if any of you were aware, but PWR don't currently have an ST185 radiator available.
But that's all changing.
I dropped off my standard one there today for them to make me a new 40mm cored aluminium radiator for the rally car, and they've confirmed that it will be used to get some base drawings so that they can do them again for everybody else.
Prices haven't been discussed, but the current one they have on file (ST165) goes for about $700.