Styling For Out Of Stock Variants

Hi

I’ve got your plugin and it’s great, i’ve set up my styling for different variations but one thing that I’m struggling to do is to display out of stock variations different to in stock ones. Ideally I’d like to have a big black X through the box and have the selection greyed out, is this possible? For example, on my link variation XL is out of stock but the customer won’t know until selecting it.

Thanks

The page I need help with: [log in to see the link]