WooCommerce dropdown with product

Hi

I’m using WooCommerce and I need to find out, if the plugin i search for is available to me.

Lets say I have a webshop where I sell computers. On the single product page I have the computer and related products below. It should be possible for the costumer to choose if they want an insurance on the produkt, but this should not be a related produkt. Instead it should be something that the costumers are available to choose from a drop-down menu, like if it was color or size of a produkt. But how do I make such a drop-down menu?

When the costumer choose a computer + insurance, two productlines should appear in the cart.

Can someone guide me to a way to do so, a plugin or someone who can build such plugin? Thanks.

Best regards
Anders, Denmark