Bench Seat Release Knob

Anyone know what the chrome knob is called that releases the bench seat to come forward for entry into the back seat? Or better yet, where to find a pair? I've searched all of my websites with different terminology and can't find it. All I've found so far is the button for the lever that moves the entire bench forward, but that's not the one I want.

It's one of the only items I'm missing for my interior.

Thanks,

Jim
Jacksonville, FL