First thing take the wheel to a shop and see if it can be saved. If not try the wheel off the toys r us bike and see if it fits. Too bad you didnt go to wallmart thay take anything back. At 15 a 10 yr old bike is realy old. For me at 43 a 1997 bike is one of those new ones.Its nice to hear from a young guy that knows that quolity is ageless. I have a trek 930 from around the same time as your bike and an 800 antelope from 1981 , you can get newer at wallmart but you cant get better.
Come on San Diego members help this guy out.