Why not use the big polar bear fabric as a center to a quilt and just add borders to make it the size you want? I did that with my grandson's quilts. I had some white tigers and the co-ordinating fabric as just of smaller white tigers. I framed out the "main" center piece with a dark green, and bordered in the bamboo fabric and the smaller white tigers. They loved them and my daughter wanted the last white tiger panel I have, but I am going to make my own quilt with it for my bed........and I have a queen size with high mattress.
that's what I would do........