There are 3 different ways.
1. Get the QI needed for Pure(10,000) or Void(20,000) and then buy it from the Torishop for USD.
2. Get the QI needed for Pure(10,000) or Void(20,000) and then buy it from the market for TC if you can't/don't want to use USD.
3. Buy it for No-QI from the Marketeers when they restock. Pure/Void Forces and Relaxes generally cost I think somewhere around 300k-500k. Been a while since restock so I don't remember the price.