Display when an item is already in cart

New Member
2 0 1
Hi everyone.
I am almost done building out my store and I am using Turbo from OOTS. I am selling craft products - and most orders would probably consist of 8-12 items based on previous experience. I have disabled dynamic checkout for this reason, but in testing pre-launch with some buyers, someone has pointed out that they would like to be shown when an item is already in their cart so as not to add it twice - and I can see how this would be of huge benefit to my shoppers - and when I shop on other stores I love this feature too.
I have hunted high and low to find a built-in feature/setting that will do this - but does anyone know of an app / code that would do this?
Many thanks