Hypersonic was not a sole Steinberg product, and now the licensing has finished it is no longer available to buy standalone.

The sound engine itself continues on, as it has been incorporated into the Wersi OAS system. (All the new OAS 7 voices use it)

To show how you can compile VSTs into an arranger system, have a look at this link here http://www.synthzone.com/ubbs/Forum37/HTML/018112.html

Regards

Bill