Finally found a decent OEM wheel. This will replace the Alcantara one on the car (see the first post) which was done by a previous owner. Nothing wrong with it, I just don't like it, and it'll be sold to recoup the cost of this - £400!
Fitted the new wheel, feels great, only problem is I think I put it 1 notch over to the left so it's not quite straight! Will sort it out next weekend.
No leaks from the cam cover gasket either, so all good there too.