Yeah... but for the price of a new ITR block (Well, $100 more...) you could get an aluminum Dart block w/ 85mm sleeving that can handle up to 40 psi (Holy shit!) worth of boost.
Anyways, yeah, you can buy a whole new engine from a dealer, but I don't think they'll make it cheap for you.
Unless there was a MAJOR problem, I'd rather spend the money and rebuild than replace...