Surely you’d have to drastically change the wheel size for it to have any noticeable effect ?
What have you changed from (wheel/tyre size) and what have you put on ?
Why would you want to do this unless you're trying to in effect clock it?
It's not illegal to clock a car but it is illegal to sell that car on clocked without telling the buyer or dealer that it's clocked.
Also as this would be classed as a modification you'd have to notify your insurance company at which point I suspect they'd void your insurance. But if you crash it and they check the car and find this fitted then your insurance would be void anyway
Hi there is no repair option, get the part number off of it and go fishing on the breakers sites for original or eBay for aftermarket which will be cheaper.
Steve.