Man I believe that both are the same frame, only poweder coated. If not, probably it will fit a non isis wheelset if the distance between the bearings is the same as a KH Hub (100mm), and the bearing is 42mm.
I can’t see why the frame would not fit your wheelset if your setup have the same sizes as an ISIS!
He’s not sure since he has an old qu-ax hub. It’ll work. I think qu-ax has 42mm, even older ones. Still, you can use some pop cans or an old inner tube, both work fine. I rode a unicycle like that for months.