Hey @CampbellD,

I don’t see why you wouldn’t be able to!

Depending on what your goal is, the most common way I’ve seen users accomplish this is through an embedded signup form. I’ve even seen users take it a step further where they allow users to select the product they want an update on if they have several that are unavailable. 

Alternatively, you could also simply use the standard back in stock setup and use some CSS code to adjust how the button looks only for those products that are unavailable as opposed to being out of stock. You’ll want to work alongside your own developer if you were leaning towards this option. We also have an expansive network of Klaviyo Partners you can speak with as well if you need an introduction to a developer. 

I hope this helps!

David