Is there a belt clip that is made to fit any kind of case for the iPhone 6S?

I have a case on my iPhone 6S. I'd kinda like to get a belt clip for it, but I don't wanna replace the case, just add a belt clip holster. Does this even exist, or am I out of luck? I've looked on Amazon, Wal Mart, Google'd it, but never really came up with an actual belt clip made to fit around your existing case.

You can get leather pouch belt clip holsters which is simply a leather pouch you put the phone into that has belt loops on it, they tend to have quite a bit of wiggle room which would help with bigger cases. I had one for my iPhone 5 last year and it worked with my case which was quite bulky. I don't think one exists that actually snaps around the case as cases differ a lot in size, thickness and shape, it would be difficult for it to get a secure fit around the case