I upgraded my C5+ with a JMI megapod and now have this wedge laying around. It has the knob screws to hook the drive base to the wedge. I think it will work with a C8 as well. This is a tabletop/tripod wedge. VGC.
These are about $100.00 or more new. $60.00 shipped. I do have the aluminum tripod too if you want it I'll sell that for $30.00, although I was going to use it as a plant stand! I will deliver this within 100 miles of Charlotte, NC. On weekends only.