Here is a link to where you can purchase the SouthPaw rotational device. The carabiners I got at REI. Here is a link to where you can purchase the same handmade hammock swing we have, from HangLoose Hammocks. Or here is a swing chair that could be used for a child that needs more enclosure, or this one for a child that needs even more support. There are no doubt countless options to suit your needs if you look around. The bonus for us is that it solved a seating issue in our TV room. The big kids sometimes fight over who gets to sit there. Every kid who comes to visit loves it too.
It's fun, it's a place for anyone to sit, it's therapeutic, it's awesome!