Picked up some saloon sti 18's and have now fitted them, happy with the look. They didn't come with center caps though so got to find some that fit, the genuine ones are nearly half the price I paid for the wheels

 

don't know what's the size do you need but I got this ones
http://www.ebay.co.uk/itm/4-Set-STI-...vip=true&rt=nc

 

Something like those would do the job, need to find out for sure the type needed as some from the older style classic wheels were the right size but the back piece wouldn't clip in