Keepsake carries/has recently (in the last 1-2 years) carried the following brands of solids in the shop...Kona, Marcus Brothers, Northcott, a bit of Moda, and one other that, regretfully, escapes me for the moment. I'd try Marcus and Northcott for that edge.
As you know from shopping there, they're famous for covering the manufacturer names on the bolt ends. They don't want you to know who makes the fabric you're looking at...probably so you don't go buy it online or somewhere else. Their famous 'Amish Black' is a prime example of this practice from the catalog side of the business, too.