How to Show 'buy' button relevant to character selected ?

I am using Playfab as BAAS.
I have created 20 character in unity 3d, the behavior of Character selection is Carousel. so I have added all my Characters as a Inventory items, I can able to instantiate the ‘buy’ button in UI. Now problem is i need to instantiate the buy button appropriate to active character, is there any way to solve this?

for my shop i have made individual buy button for each item.