Brett, I don't have one or a picture, but I remember them. Dan was a big man, and he designed the bow for a big man's long draw and made the bow 72" long to accommodate it. It had a handle that was set back to give it a profile unstrung that looked like a gull in flight, which he said increased the energy stored in the limbs at full draw. I don't remember for sure which bowyer made them, but at the time his main bowyer was Jeffrey. He and Owen "debated" bow design regularly, Owen sometimes doubting Dan's designs, but making bows for him that shot beautifully anyhow. Dan's most popular bow, the Longhunter, was based on Owen's original design, with Dan's adaptations.
I think the Gull was pictured in his brochures somewhere around 1990, but unfortunately I don't have one.