Oh, I just looked at your quilt. The blocks are very nice and set at an angle is so interesting. Congrats, it will bring many memories. I am, however, with the lady by the name of Lois (on your other link) and her suggestion of red-blue borders. I am not too keen on the green even for back but if that is what you have available, sometimes that is a must. Does the person have any cotton shirts? The back of the shirts could be cut into plain 12-inch squares and pieced for a backing. That way the fabric would be cotton and thin enough not to be difficult to quilt.