It looks like there was more than one quilt in this pattern at that show. Reverse image lookup pulls up references to Edyta Sitar. Sure enough, she was a speaker at that guild in January 2012. So it may be her quilt pattern, although I don’t see it on her website: laundrybasketquilts.com. You might try contacting her through her website. Or maybe there is a member of the Midland Quilters Squared here on quiltingboards.