You can buy a new leg shield for $40 at dratv.com, it's the one for 1982-83 Passports.
Batteries are easy, just get the number off the old one and call a Batteries Plus store, I'm sure there's one in Grand Rapids.
You can buy all the rim parts new at dratv too, but it'll be expensive and you'll have to either rebuild the rim yourself, which is difficult, or pay a shop to do it, which is kind of expensive. Better to find the wheel and forks on Ebay. There's no guarantee that actual Passport forks will fit the clone, but they might.
Did they somehow manage to break all that stuff but not break the front fender? If so, that's amazing, those chinese plastic fenders break if you even look at them the wrong way.