Reduce stock for all variants to 0 if one variant is sold out?

Hi! 

Is it possible to reduce the number of units in stock to 0 for all variants once one of the variants has 0 stock? 

For context, we are selling pre-used items on our website, which means there's only one unit in stock for each item. However, we are currently using variants for some of the products to allow customers to choose between buying the product with or without assembly. So for example, if a customer buys an item with assembly, we are hoping to automatically have the entire item marked as sold out, but currently the item without assembly would still be shown as available in this case. 

Also open to any other suggestions that don't use variants to achieve this!

Thanks