Removing Dropdowns when out of stock

Hey,

Here is my issue. On a variable product, when the customer picks a colour, the dropdowns still show all attributes even if there were no red mediums, they have to go through all dropdowns to find if it is avaliable. On our store we sell kayaks and there are usually like 4 different variable dropdowns. Is there a way for if I select a colour, it only shows the other variables in the dropdown that are avaliable.

example: If they choose a red boat (and we only have a red large in stock), can it say that the Medium option is out of stock without them needing to go through all the options to find one in stock.

Thanks
Stephen