I am having troubles finding men's athletic underwear that actually fits a 28" waist. I have tried UA, Nike, Exofficio, Saxx, Addidas, and Lululemon and they all bottom out around a 30 which leaves me bunching up and unsupported. I feel like 28" is not that tiny, especially for endurance athletes, so there must be something. I have even tried the boys department, but boys clothes are not cut with a man's body in mind, let alone a fit man's body in mind.

Not to be too particular, but ideally I would like a ~3" trunk.

Any other suggestions to try?