Hi mate give these a ring they should be able to point you in the right direction hopefully pretty good to be fair.
http://www.importcarparts.co.uk/parts?cat=96
Might be able to find from a breakers not sure if their would be a difference from a Turbo model either. But I think be a full rad you would need to get to replace it.
We was going to switch the track from the Top Gear track as it was too easy to cut corners. I've not played it for awhile and switched to using the wheel so my times drop off sometimes