The first was created by Cinetronic. It mounts into the standard spud socket and includes the hardware to do so. It also comes with the machined thumb-screws to attach the monitor to the yoke. All items included are pictured. $150 obo.
The second was sold by GPI but I'm unclear as to who fabricated it. It simply attaches to your spud (spud not included here). I don't have the hardware (four 1/4-20 screws) to mount the monitor to the yoke but they are readily available at your local hardware store or online (McMaster Carr for example). $100 obo.
Buyer pays shipping. Contact me with questions.
818 284 5172