I have a few black/orange variegated threads from Valdani that I plan on using on a Halloween quilt.
http://www.valdani.com/product_details/2
Search for Color#'s M61 and M804
Mind you, the quilt is not even made yet. But I have the thread. :roll:
There are a ton of variegated orange only threads as well.
(It's a wonky website.)
Your quilt is great! Perfect for the season.