Take some good pics of the bore and e-mail them to US Chrome for evaluation. More than likely they can weld up the damage, bore, plate, and hone the cylinder for you. The total will be in the neighborhood of $260 and you'll have a cylinder that's as good if not better than new. If possible send the new piston along and they'll match the cylinder to it.
As far as the 99 & 00 cylinders, I can't say for sure. The fiche lists different numbers for both the head and cylinder. The difference may just be in porting and volume of the head and be interchangable or it may be more than that, I simply don't know.