These are often found on vacuum cleaner cables and such.
I’d like one to clip onto a two wire (two pronged, no ground) flat cable like this one: 
Anything like that exist yet?
These are often found on vacuum cleaner cables and such.
I’d like one to clip onto a two wire (two pronged, no ground) flat cable like this one:
Anything like that exist yet?
I haven’t looked to see if one already exists.
But, like someone else said, this would be relatively easy to model.
I would go about it in a different way; here’s a quick drawing:
Make the loop for the plug side slightly smaller than the diameter of the cable so it’s a super snug fit, and the other side with a large enough gap that you can easily push the cable through it.