I would like to setup shipping where some products have a flat rate for shipping that's set per item. Also, I want to ship these items only within 48 states. Is there a way to set this up?

Following suggestions in FAQ and some other thread, I setup Per Unit perweightunit module and then use shipping weight for shipping cost. That seems to work fine, but how do I restrict acceptable shipping addresses to 48 states? I think that's possible using another module, such as Region Tables, but then I can't set shipping cost per item, right?

Thanks!!