My swivel seat is made by Amerimark. It was $25, including shipping, and worth every penny! I can't twist at all, being fused from T4 to sacrum, so having this seat so I can turn just that little extra bit when backing up or at an odd angled intersection has been a huge help! It took a little practice leaning forward just enough to be able to turn the seat a little while driving, but once I got it down, it was wonderful. And of course, it also makes it easier to get in and out.
Emily