I was unable to find available plants at any of the listed suppliers but did have luck ordering from soonerplantfarm.com. It will be my first time ordering from them.
9/19/17 update: I was very pleased with the plant that I received from soonerplantfarm.com and would order from them again.
The Missouri Botanical Garden website includes Oso Easy Honeybun at http://www.missouribotanicalgarden.org/gardens-gardening/your-garden/plant-finder/plant-details/kc/f242/.aspx
From the site: "Flowers (each to 2” diameter) bloom in terminal clusters (3-5 flowers per cluster) over a long late May to frost bloom period. Flowers typically vary in color from blush-pink to butter yellow to creamy white. Flowers are slightly fragrant. Compound glossy green leaves (to 3" long) have ovate leaflets (to 1" long) with serrulate margins. Parents of this rose are Rosa 'Flower Carpet' (female) and Rosa 'Shine On' (male). U. S. Plant Patent PP21,611 was issued on January 11, 2011."