You got any pics of your dad's split ?
I think the only guaranteed solution would be to scrap the car.
Lol You obviously don't need to go to the stupid lengths of scrapping the car (idiots), just remove the affected wheel, and the wheel on the opposite side, then fit tank tracks.
For f**ks sake does anyone have anything sensible to say?A £1000 set of BBS Splits and new tyres is the only way forward for the man.