Yes, Huss still does manufacture the Top Spin. Here's a link to their page.
O.K. I was just wondering and I was thinking that if the Huss Top Spin model is still in production, maybe Darien Lake can invest in replacement parts for Twister or a "new" Top Spin ride. But as long as those "cheapskates" of CNL are at the "reins" of Darien Lake, they won't even think twice of investing in a new or used Top Spin ride for Darien Lake.
I think Top Spins are an "endangered" ride species at least in theme parks now a days.