This solid pier and adapter plate was originally designed for the MI-250 mount, but using the Losmandy MA adapter, I used it for the G11 with great success. The plate has a 3/8-16 threaded tap in the center, so it is likely adaptable to other mounts. It is in fantastic shape and stands 43" tall, perfect for refractors or SCTs.
This Pier and plate would be $779 (pier $679, plate $100) new + shipping. I will sell it for $525 + shipping. I'd prefer to sell to someone in the Phoenix/Scottsdale area to avoid shipping this beast...it weighs about 85 lbs all assembled!