I'm looking for replacement pouches with pour spout for my fireball keg. Does your box of 2 pouches come with pour spout and attach to the fireball keg? Thank you!

Yes it is this item. https://arthurcantina.com/products/fireball-cinnamon-whiskey-keg-5-3l
It will be back in stock within a few days.

Can this item be use in the Fireball Keg as a refill

It can be according to many customers.