You will notice the list of parts in the picture below. The total is not cheap at $5370 but considering the company is Australian one would hope that is in Australian dollars. BimmerBoost will get clarification on the pricing from Nizpro.
The main thing to take away from this is that with the Nizpro upgrades if you do a turbo upgrade on the N63 or S63 V8 engines you will be able to increase torque without having to worry about the transmission cooperating.
Also, Nizpro is developing upgrades for the ZF6HP21 transmission in E9X 335i's so they definitely are covering their BMW bases and expanding their BMW offering.
Thank you to @m5james for the screenshot.