Julia Ann's Deep Thrusting Harness was discontinued by the manufacturer but here's a great substitute

order the inflatable ball dildo $42.00 Ride into ecstasy on a realistic cock. Compact for travel, easily inflatable, and supports up to 250 pounds. Ball measures 8 inches high with a circumference of 28.5 inches. This product uses the Vac-U-Lock system
ReviewsThis was an interesting toy to try out. It was better that expected and worth every penny. The use was so easy and its just like riding your man, except it did not start going down before you. You can bounce and ride all you like and even try ned positions. The ways you can shift the ball and still be able to ride help to hit those extra areas that want attention. The clit stimulation with the right toy helps as well and the toy that comes with this one is a perfect size, but glad there are other attachements available. Never know what next you will want to try.