Why not create your own decorations (or cut them out and let the children colour them in!). I have created 4 new Christmas designs that can be tree baubles, colouring in sheets or you could even make Christmas cards, which I'm about to have a go at and should be available to purchase very soon.
https://www.etsy.com/uk/shop/SASCreative?section_id=18163628&ref=shopsection_leftnav_8