Hunker down and buy the Cleveland upgrade. The Goodyears are very expensive and hard to get nowadays. If you are going to keep the plane, this is the best way. At least you won't have to jack the plane to change the worn pads.
If this is not an option, think about getting the existing discs nickel plated. Find someplace that won't just do a bumper chrome, as they tend to peel off with use. The plating will add some thickness to them and be very hard also.