I'm looking for a wall-mounted bar where I can simply clamp a few prints in the bar for temporary viewing. The bar should attach to the wall and have some kind of friction clamp or jaw to hold the print in place. The closest thing I can think of is the bar you typically see doctors use to hold x-rays in front of a lightbox (at least on TV).
I may have even seen such a mounting bar in a LuLa video or some similar video, but I have no idea where to find such a beast. No luck on the Internet ... so far.
Any suggestions on where to purchase such a bar? Or at least what it's called so I can continue my search?