Stainless clamps for roof racks

I've seen these somewhere but can't remember where and google's been no help.
The type fitted to JK style racks. Basically a bit of threaded bar with a bent plate welded to it.
JK have the mild steel ones but I want stainless.
Anyone know where sells them?

 

Make some?

 

Very kind of you to offer.
I'll have 10 please. ;-

 

LOL

I could make you some if you have a steel one for me to copy

 

Seriously? I need 10, I have the stainless bar, it's the metal cutting and folding I can't do.
D'ya think they'd be expensive?
I can send you one no problem.