A few years back around 2012 or so, HL carried the Estes labeled AT SU motors. They had the F26-6FJ, the F50-6T, G40-7W and the G80-7T. About a year later, they put them as well as the Laviathan and Ventris PSII kits in the clearance section.
I have a whole box full of the Estes SU composites that I got from HL.
However I wish they sold AT reloads and hardware. Imagine buying reloads and hardware at 40% off.