cs-cart mod required

Hello I need a mod to stop product options showing up even when the option is out of stock. Example: I define 'Size' as an option and fill the inventory. The stock for this option becomes 0 after a user buys the last one. The option is still displayed on the product page and when another user tries to add the option to the cart they get a message that the option is out of stock. The mod is to remove (stop displaying) options that are not in stock. I dont need a beautiful solution, just a SIMPLE fix to this problem.