With more and more people using tripods as a rear rest in PRS/NRL/MARS style matches, Tony at Impact Data Books came up with an innovative idea to help them get more stable and be able to move positions easily and even have a place to set the rifle butt without it sliding. He called it the MARS(Mini Anchor Rear Support) Rest *Patent Pending*. He has different sizes for different tripods. Below is his website with them and his video showing the product.
