External purchase in store?

[Sirmadsen]

Hi community!

Is there a way to add a external purchase in the store, having a button instead of the "add to cart" button?

As of now I have to set the product to out of stock and leave a link in the description. But having a "Out of stock" which will be the first thing a customer will se does not look good.

Or maybe another workaround like a plugin or something? I've also noticed you can't add messages to store products which feels a little weird.