So eventually I picked up the black using some black cardstock from Puffin Crafts, which I had to line with copier paper inside as vellum looks nice but I can't manage to use it as a liner without
the glueing medium showing up. The trees are fussy cut with foam pads on top of an identical layer as a topper.
The great thing is that with a separate Christmas variety pack and the Festive Frost subpack that I've bought over the last month or so in the sale meant I've been able to make 7 of each of the three quite quickly - I've decided to make cards in batches and sell them closer to Christmas, not sure how or where or when. So am now using the 365 Card challenges to see if any of the challenge cards I make can be made in batches and are saleable.