Load product attribute in module block without using load() methos

I've file like app/code/local/Xx/Multistepcheckout/Block/Cart/Item/Renderer.php

In which I've function like following

public function checkItemStatus($_item, $qty, $sku) {
        $product = Mage::getModel('catalog/product')->loadByAttribute('sku', $sku);
        $_product = Mage::getModel('catalog/product')->load($product->getId());
        $stockstatus = $_product->getXxxstatus();
        //Rest of the code....
}

Here in function I don't want to use following lines

$product = Mage::getModel('catalog/product')->loadByAttribute('sku', $sku);

$_product = Mage::getModel('catalog/product')->load($product->getId());

Try 1 : So to do so I've add following code in config.xml

<global>
       <sales>
            <quote>
                <item>
                    <product_attributes>
                        <xxxstatus />
                    </product_attributes>
                </item>
            </quote>
        </sales>
    </global>

And in this file app/code/local/Xx/Multistepcheckout/Block/Cart/Item/Renderer.php I've used like $_item->getData('xxxstatus')) but it's not working.

So is there any way in which I can reduce the use of load() method?

Let me know if you want more details.