Caterham radiator question

[eharding]

I'm trying to get some information of replacement radiators for a Caterham 7 (on behalf of my brother-in-law). The car is a 1994 Rover K-Series 1400, rebuilt on 1996 at the factory on a 96 chassis. The car is currently in Cyprus, and the radiator has just failed. I've checked the Caterham website and phoned the factory - they have a standard radiator for 184 or a race radiator for 260 both plus VAT. Does anybody have any experience on cooling ability, durability and any fitting problems of the race radiator vs the standard road item (bearing in mind it's in the high 30s Celsuis in Cyprus right now an apparently the car would rarely register less than 100 degrees C on the temp gauge, but that might also relate to the age of the old radiator). Also, the factory mentioned something called an 'Air-Oil Separator' which might help with the cooling - does anybody know how this works, and whether it would require major engine surgery to fit such a thing?

regards,

Ed.