I have a pair of stock Supra Fly High Pro X Fatsacs (ballast bags) 70x16x10 (appx. 400 lbs each). They come with the 3/4" male quick connect ends. I can also provide the Fly High standard plugs and one Fly High W730 Quick Twist for each bag in case you did not want to plumb in the bags in an automatic ballast system. $125 for the pair.
Also willing to trade for a pair of the Pro X 400lb v-drive sacs.