Replacement Wheels For Scalextric F40

I'm slowly recommissioning all the cars from my teenage years and bought some new tyres for the F40 as the old ones had cracked. I hadn't realised though that the wheels had gone brittle and had also cracked, so although still tight they are running miles from true.

I'd like to keep the correct Ferrari style wheels and ideally use the same tyres as they're brand new, but aside from direct replacement wheels from Scalextric (Which I'm reluctant to do because frankly, they're rubbish), what alternatives are out there?