How do I use the HPF Quick-Add Feature?

Start typing a manufacturer part number into the textbox. As you type, the drop down will show a list of available items that match your characters. When you see the item you want, double-click on it from the drop down list. Click the 'Add to cart' button to put the item in your cart.
What if the HPF Quick-Add 'Add to Cart' button is disabled?

The button is disabled until an item is selected (by double-clicking) from the drop down list. Typing the entire item number and clicking the 'Add to Cart' button will not work.
How do I contact HP Fairfield?