See here. Looks like Paradigm Shaveware – who burst onto the shave scene about a year ago with their fully machined titanium razor that had certain people attack it without even trying it – are experimenting with a Single Edge razor.
Their take on the SE looks quite different from most I’ve seen, with a sliding top cap and two ball detents. The non-removable handle might be a deal-breaker for some, but I very seldom mix and match handles anyway, so I have no strong opinions for or against that design choice.