Hi and welcome to the forums Brandon.
I have made a few sheaths for the Random task and they were horizontal styles, the bulge of the handle really make it seat well in the sheath. But the guys I've made them for are not on Bladeforums and I don't have any images to show you of the RT in a sheath, but as Nifrand mentioned the Ricochet has a similar handle profile and I believe his was also a horizontal carry. I've owned about 8 or 9 of the RT's and seems like everyone else liked it too and talked me out of mine, right now I'm random taskless but am looking to pick one up as I do love the mech and the blade shape!
Sorry couldn't help on the pic, but it would be similar to what the Sebenza horizontal sheath looks like, can see them on my web page, click on the house to head towards that...
G2